21 files changed, 492 insertions, 543 deletions

diff --git a/drivers/media/video/arv.c b/drivers/media/video/arv.c
index 31e7a123d19a..f989f2820d88 100644
--- a/drivers/media/video/arv.c
+++ b/drivers/media/video/arv.c
@@ -712,7 +712,7 @@ static int ar_initialize(struct ar *ar)
 static const struct v4l2_file_operations ar_fops = {
 	.owner		= THIS_MODULE,
 	.read		= ar_read,
-	.ioctl		= video_ioctl2,
+	.unlocked_ioctl	= video_ioctl2,
 };
 
 static const struct v4l2_ioctl_ops ar_ioctl_ops = {
diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c
index a529619e51f6..0902ec041c7a 100644
--- a/drivers/media/video/bt8xx/bttv-driver.c
+++ b/drivers/media/video/bt8xx/bttv-driver.c
@@ -854,7 +854,6 @@ int check_alloc_btres_lock(struct bttv *btv, struct bttv_fh *fh, int bit)
 		xbits |= RESOURCE_VIDEO_READ | RESOURCE_VIDEO_STREAM;
 
 	/* is it free? */
-	mutex_lock(&btv->lock);
 	if (btv->resources & xbits) {
 		/* no, someone else uses it */
 		goto fail;
@@ -884,11 +883,9 @@ int check_alloc_btres_lock(struct bttv *btv, struct bttv_fh *fh, int bit)
 	/* it's free, grab it */
 	fh->resources  |= bit;
 	btv->resources |= bit;
-	mutex_unlock(&btv->lock);
 	return 1;
 
  fail:
-	mutex_unlock(&btv->lock);
 	return 0;
 }
 
@@ -940,7 +937,6 @@ void free_btres_lock(struct bttv *btv, struct bttv_fh *fh, int bits)
 		/* trying to free ressources not allocated by us ... */
 		printk("bttv: BUG! (btres)\n");
 	}
-	mutex_lock(&btv->lock);
 	fh->resources  &= ~bits;
 	btv->resources &= ~bits;
 
@@ -951,8 +947,6 @@ void free_btres_lock(struct bttv *btv, struct bttv_fh *fh, int bits)
 
 	if (0 == (bits & VBI_RESOURCES))
 		disclaim_vbi_lines(btv);
-
-	mutex_unlock(&btv->lock);
 }
 
 /* ----------------------------------------------------------------------- */
@@ -1713,28 +1707,20 @@ static int bttv_prepare_buffer(struct videobuf_queue *q,struct bttv *btv,
 
 		/* Make sure tvnorm and vbi_end remain consistent
 		   until we're done. */
-		mutex_lock(&btv->lock);
 
 		norm = btv->tvnorm;
 
 		/* In this mode capturing always starts at defrect.top
 		   (default VDELAY), ignoring cropping parameters. */
 		if (btv->vbi_end > bttv_tvnorms[norm].cropcap.defrect.top) {
-			mutex_unlock(&btv->lock);
 			return -EINVAL;
 		}
 
-		mutex_unlock(&btv->lock);
-
 		c.rect = bttv_tvnorms[norm].cropcap.defrect;
 	} else {
-		mutex_lock(&btv->lock);
-
 		norm = btv->tvnorm;
 		c = btv->crop[!!fh->do_crop];
 
-		mutex_unlock(&btv->lock);
-
 		if (width < c.min_scaled_width ||
 		    width > c.max_scaled_width ||
 		    height < c.min_scaled_height)
@@ -1858,7 +1844,6 @@ static int bttv_s_std(struct file *file, void *priv, v4l2_std_id *id)
 	unsigned int i;
 	int err;
 
-	mutex_lock(&btv->lock);
 	err = v4l2_prio_check(&btv->prio, fh->prio);
 	if (err)
 		goto err;
@@ -1874,7 +1859,6 @@ static int bttv_s_std(struct file *file, void *priv, v4l2_std_id *id)
 	set_tvnorm(btv, i);
 
 err:
-	mutex_unlock(&btv->lock);
 
 	return err;
 }
@@ -1898,7 +1882,6 @@ static int bttv_enum_input(struct file *file, void *priv,
 	struct bttv *btv = fh->btv;
 	int rc = 0;
 
-	mutex_lock(&btv->lock);
 	if (i->index >= bttv_tvcards[btv->c.type].video_inputs) {
 		rc = -EINVAL;
 		goto err;
@@ -1928,7 +1911,6 @@ static int bttv_enum_input(struct file *file, void *priv,
 	i->std = BTTV_NORMS;
 
 err:
-	mutex_unlock(&btv->lock);
 
 	return rc;
 }
@@ -1938,9 +1920,7 @@ static int bttv_g_input(struct file *file, void *priv, unsigned int *i)
 	struct bttv_fh *fh = priv;
 	struct bttv *btv = fh->btv;
 
-	mutex_lock(&btv->lock);
 	*i = btv->input;
-	mutex_unlock(&btv->lock);
 
 	return 0;
 }
@@ -1952,7 +1932,6 @@ static int bttv_s_input(struct file *file, void *priv, unsigned int i)
 
 	int err;
 
-	mutex_lock(&btv->lock);
 	err = v4l2_prio_check(&btv->prio, fh->prio);
 	if (unlikely(err))
 		goto err;
@@ -1965,7 +1944,6 @@ static int bttv_s_input(struct file *file, void *priv, unsigned int i)
 	set_input(btv, i, btv->tvnorm);
 
 err:
-	mutex_unlock(&btv->lock);
 	return 0;
 }
 
@@ -1979,7 +1957,6 @@ static int bttv_s_tuner(struct file *file, void *priv,
 	if (unlikely(0 != t->index))
 		return -EINVAL;
 
-	mutex_lock(&btv->lock);
 	if (unlikely(btv->tuner_type == TUNER_ABSENT)) {
 		err = -EINVAL;
 		goto err;
@@ -1995,7 +1972,6 @@ static int bttv_s_tuner(struct file *file, void *priv,
 		btv->audio_mode_gpio(btv, t, 1);
 
 err:
-	mutex_unlock(&btv->lock);
 
 	return 0;
 }
@@ -2006,10 +1982,8 @@ static int bttv_g_frequency(struct file *file, void *priv,
 	struct bttv_fh *fh  = priv;
 	struct bttv *btv = fh->btv;
 
-	mutex_lock(&btv->lock);
 	f->type = btv->radio_user ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
 	f->frequency = btv->freq;
-	mutex_unlock(&btv->lock);
 
 	return 0;
 }
@@ -2024,7 +1998,6 @@ static int bttv_s_frequency(struct file *file, void *priv,
 	if (unlikely(f->tuner != 0))
 		return -EINVAL;
 
-	mutex_lock(&btv->lock);
 	err = v4l2_prio_check(&btv->prio, fh->prio);
 	if (unlikely(err))
 		goto err;
@@ -2039,7 +2012,6 @@ static int bttv_s_frequency(struct file *file, void *priv,
 	if (btv->has_matchbox && btv->radio_user)
 		tea5757_set_freq(btv, btv->freq);
 err:
-	mutex_unlock(&btv->lock);
 
 	return 0;
 }
@@ -2172,7 +2144,6 @@ limit_scaled_size_lock       (struct bttv_fh *               fh,
 
 	/* Make sure tvnorm, vbi_end and the current cropping parameters
 	   remain consistent until we're done. */
-	mutex_lock(&btv->lock);
 
 	b = &bttv_tvnorms[btv->tvnorm].cropcap.bounds;
 
@@ -2250,7 +2221,6 @@ limit_scaled_size_lock       (struct bttv_fh *               fh,
 	rc = 0; /* success */
 
  fail:
-	mutex_unlock(&btv->lock);
 
 	return rc;
 }
@@ -2282,9 +2252,7 @@ verify_window_lock		(struct bttv_fh *               fh,
 	if (V4L2_FIELD_ANY == field) {
 		__s32 height2;
 
-		mutex_lock(&fh->btv->lock);
 		height2 = fh->btv->crop[!!fh->do_crop].rect.height >> 1;
-		mutex_unlock(&fh->btv->lock);
 		field = (win->w.height > height2)
 			? V4L2_FIELD_INTERLACED
 			: V4L2_FIELD_TOP;
@@ -2360,7 +2328,6 @@ static int setup_window_lock(struct bttv_fh *fh, struct bttv *btv,
 		}
 	}
 
-	mutex_lock(&fh->cap.vb_lock);
 	/* clip against screen */
 	if (NULL != btv->fbuf.base)
 		n = btcx_screen_clips(btv->fbuf.fmt.width, btv->fbuf.fmt.height,
@@ -2391,13 +2358,6 @@ static int setup_window_lock(struct bttv_fh *fh, struct bttv *btv,
 	fh->ov.field    = win->field;
 	fh->ov.setup_ok = 1;
 
-	/*
-	 * FIXME: btv is protected by btv->lock mutex, while btv->init
-	 *	  is protected by fh->cap.vb_lock. This seems to open the
-	 *	  possibility for some race situations. Maybe the better would
-	 *	  be to unify those locks or to use another way to store the
-	 *	  init values that will be consumed by videobuf callbacks
-	 */
 	btv->init.ov.w.width   = win->w.width;
 	btv->init.ov.w.height  = win->w.height;
 	btv->init.ov.field     = win->field;
@@ -2412,7 +2372,6 @@ static int setup_window_lock(struct bttv_fh *fh, struct bttv *btv,
 		bttv_overlay_risc(btv, &fh->ov, fh->ovfmt, new);
 		retval = bttv_switch_overlay(btv,fh,new);
 	}
-	mutex_unlock(&fh->cap.vb_lock);
 	return retval;
 }
 
@@ -2526,9 +2485,7 @@ static int bttv_try_fmt_vid_cap(struct file *file, void *priv,
 	if (V4L2_FIELD_ANY == field) {
 		__s32 height2;
 
-		mutex_lock(&btv->lock);
 		height2 = btv->crop[!!fh->do_crop].rect.height >> 1;
-		mutex_unlock(&btv->lock);
 		field = (f->fmt.pix.height > height2)
 			? V4L2_FIELD_INTERLACED
 			: V4L2_FIELD_BOTTOM;
@@ -2614,7 +2571,6 @@ static int bttv_s_fmt_vid_cap(struct file *file, void *priv,
 	fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 
 	/* update our state informations */
-	mutex_lock(&fh->cap.vb_lock);
 	fh->fmt              = fmt;
 	fh->cap.field        = f->fmt.pix.field;
 	fh->cap.last         = V4L2_FIELD_NONE;
@@ -2623,7 +2579,6 @@ static int bttv_s_fmt_vid_cap(struct file *file, void *priv,
 	btv->init.fmt        = fmt;
 	btv->init.width      = f->fmt.pix.width;
 	btv->init.height     = f->fmt.pix.height;
-	mutex_unlock(&fh->cap.vb_lock);
 
 	return 0;
 }
@@ -2649,11 +2604,9 @@ static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
 	unsigned int i;
 	struct bttv_fh *fh = priv;
 
-	mutex_lock(&fh->cap.vb_lock);
 	retval = __videobuf_mmap_setup(&fh->cap, gbuffers, gbufsize,
 				     V4L2_MEMORY_MMAP);
 	if (retval < 0) {
-		mutex_unlock(&fh->cap.vb_lock);
 		return retval;
 	}
 
@@ -2665,7 +2618,6 @@ static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
 	for (i = 0; i < gbuffers; i++)
 		mbuf->offsets[i] = i * gbufsize;
 
-	mutex_unlock(&fh->cap.vb_lock);
 	return 0;
 }
 #endif
@@ -2775,10 +2727,8 @@ static int bttv_overlay(struct file *file, void *f, unsigned int on)
 	int retval = 0;
 
 	if (on) {
-		mutex_lock(&fh->cap.vb_lock);
 		/* verify args */
 		if (unlikely(!btv->fbuf.base)) {
-			mutex_unlock(&fh->cap.vb_lock);
 			return -EINVAL;
 		}
 		if (unlikely(!fh->ov.setup_ok)) {
@@ -2787,13 +2737,11 @@ static int bttv_overlay(struct file *file, void *f, unsigned int on)
 		}
 		if (retval)
 			return retval;
-		mutex_unlock(&fh->cap.vb_lock);
 	}
 
 	if (!check_alloc_btres_lock(btv, fh, RESOURCE_OVERLAY))
 		return -EBUSY;
 
-	mutex_lock(&fh->cap.vb_lock);
 	if (on) {
 		fh->ov.tvnorm = btv->tvnorm;
 		new = videobuf_sg_alloc(sizeof(*new));
@@ -2805,7 +2753,6 @@ static int bttv_overlay(struct file *file, void *f, unsigned int on)
 
 	/* switch over */
 	retval = bttv_switch_overlay(btv, fh, new);
-	mutex_unlock(&fh->cap.vb_lock);
 	return retval;
 }
 
@@ -2844,7 +2791,6 @@ static int bttv_s_fbuf(struct file *file, void *f,
 	}
 
 	/* ok, accept it */
-	mutex_lock(&fh->cap.vb_lock);
 	btv->fbuf.base       = fb->base;
 	btv->fbuf.fmt.width  = fb->fmt.width;
 	btv->fbuf.fmt.height = fb->fmt.height;
@@ -2876,7 +2822,6 @@ static int bttv_s_fbuf(struct file *file, void *f,
 			retval = bttv_switch_overlay(btv, fh, new);
 		}
 	}
-	mutex_unlock(&fh->cap.vb_lock);
 	return retval;
 }
 
@@ -2955,7 +2900,6 @@ static int bttv_queryctrl(struct file *file, void *priv,
 	     c->id >= V4L2_CID_PRIVATE_LASTP1))
 		return -EINVAL;
 
-	mutex_lock(&btv->lock);
 	if (!btv->volume_gpio && (c->id == V4L2_CID_AUDIO_VOLUME))
 		*c = no_ctl;
 	else {
@@ -2963,7 +2907,6 @@ static int bttv_queryctrl(struct file *file, void *priv,
 
 		*c = (NULL != ctrl) ? *ctrl : no_ctl;
 	}
-	mutex_unlock(&btv->lock);
 
 	return 0;
 }
@@ -2974,10 +2917,8 @@ static int bttv_g_parm(struct file *file, void *f,
 	struct bttv_fh *fh = f;
 	struct bttv *btv = fh->btv;
 
-	mutex_lock(&btv->lock);
 	v4l2_video_std_frame_period(bttv_tvnorms[btv->tvnorm].v4l2_id,
 				    &parm->parm.capture.timeperframe);
-	mutex_unlock(&btv->lock);
 
 	return 0;
 }
@@ -2993,7 +2934,6 @@ static int bttv_g_tuner(struct file *file, void *priv,
 	if (0 != t->index)
 		return -EINVAL;
 
-	mutex_lock(&btv->lock);
 	t->rxsubchans = V4L2_TUNER_SUB_MONO;
 	bttv_call_all(btv, tuner, g_tuner, t);
 	strcpy(t->name, "Television");
@@ -3005,7 +2945,6 @@ static int bttv_g_tuner(struct file *file, void *priv,
 	if (btv->audio_mode_gpio)
 		btv->audio_mode_gpio(btv, t, 0);
 
-	mutex_unlock(&btv->lock);
 	return 0;
 }
 
@@ -3014,9 +2953,7 @@ static int bttv_g_priority(struct file *file, void *f, enum v4l2_priority *p)
 	struct bttv_fh *fh = f;
 	struct bttv *btv = fh->btv;
 
-	mutex_lock(&btv->lock);
 	*p = v4l2_prio_max(&btv->prio);
-	mutex_unlock(&btv->lock);
 
 	return 0;
 }
@@ -3028,9 +2965,7 @@ static int bttv_s_priority(struct file *file, void *f,
 	struct bttv *btv = fh->btv;
 	int	rc;
 
-	mutex_lock(&btv->lock);
 	rc = v4l2_prio_change(&btv->prio, &fh->prio, prio);
-	mutex_unlock(&btv->lock);
 
 	return rc;
 }
@@ -3045,9 +2980,7 @@ static int bttv_cropcap(struct file *file, void *priv,
 	    cap->type != V4L2_BUF_TYPE_VIDEO_OVERLAY)
 		return -EINVAL;
 
-	mutex_lock(&btv->lock);
 	*cap = bttv_tvnorms[btv->tvnorm].cropcap;
-	mutex_unlock(&btv->lock);
 
 	return 0;
 }
@@ -3065,9 +2998,7 @@ static int bttv_g_crop(struct file *file, void *f, struct v4l2_crop *crop)
 	   inconsistent with fh->width or fh->height and apps
 	   do not expect a change here. */
 
-	mutex_lock(&btv->lock);
 	crop->c = btv->crop[!!fh->do_crop].rect;
-	mutex_unlock(&btv->lock);
 
 	return 0;
 }
@@ -3091,17 +3022,14 @@ static int bttv_s_crop(struct file *file, void *f, struct v4l2_crop *crop)
 	/* Make sure tvnorm, vbi_end and the current cropping
 	   parameters remain consistent until we're done. Note
 	   read() may change vbi_end in check_alloc_btres_lock(). */
-	mutex_lock(&btv->lock);
 	retval = v4l2_prio_check(&btv->prio, fh->prio);
 	if (0 != retval) {
-		mutex_unlock(&btv->lock);
 		return retval;
 	}
 
 	retval = -EBUSY;
 
 	if (locked_btres(fh->btv, VIDEO_RESOURCES)) {
-		mutex_unlock(&btv->lock);
 		return retval;
 	}
 
@@ -3113,7 +3041,6 @@ static int bttv_s_crop(struct file *file, void *f, struct v4l2_crop *crop)
 
 	b_top = max(b->top, btv->vbi_end);
 	if (b_top + 32 >= b_bottom) {
-		mutex_unlock(&btv->lock);
 		return retval;
 	}
 
@@ -3136,12 +3063,8 @@ static int bttv_s_crop(struct file *file, void *f, struct v4l2_crop *crop)
 
 	btv->crop[1] = c;
 
-	mutex_unlock(&btv->lock);
-
 	fh->do_crop = 1;
 
-	mutex_lock(&fh->cap.vb_lock);
-
 	if (fh->width < c.min_scaled_width) {
 		fh->width = c.min_scaled_width;
 		btv->init.width = c.min_scaled_width;
@@ -3158,8 +3081,6 @@ static int bttv_s_crop(struct file *file, void *f, struct v4l2_crop *crop)
 		btv->init.height = c.max_scaled_height;
 	}
 
-	mutex_unlock(&fh->cap.vb_lock);
-
 	return 0;
 }
 
@@ -3227,7 +3148,6 @@ static unsigned int bttv_poll(struct file *file, poll_table *wait)
 		return videobuf_poll_stream(file, &fh->vbi, wait);
 	}
 
-	mutex_lock(&fh->cap.vb_lock);
 	if (check_btres(fh,RESOURCE_VIDEO_STREAM)) {
 		/* streaming capture */
 		if (list_empty(&fh->cap.stream))
@@ -3262,7 +3182,6 @@ static unsigned int bttv_poll(struct file *file, poll_table *wait)
 	else
 		rc = 0;
 err:
-	mutex_unlock(&fh->cap.vb_lock);
 	return rc;
 }
 
@@ -3293,23 +3212,11 @@ static int bttv_open(struct file *file)
 		return -ENOMEM;
 	file->private_data = fh;
 
-	/*
-	 * btv is protected by btv->lock mutex, while btv->init and other
-	 * streaming vars are protected by fh->cap.vb_lock. We need to take
-	 * care of both locks to avoid troubles. However, vb_lock is used also
-	 * inside videobuf, without calling buf->lock. So, it is a very bad
-	 * idea to hold both locks at the same time.
-	 * Let's first copy btv->init at fh, holding cap.vb_lock, and then work
-	 * with the rest of init, holding btv->lock.
-	 */
-	mutex_lock(&fh->cap.vb_lock);
 	*fh = btv->init;
-	mutex_unlock(&fh->cap.vb_lock);
 
 	fh->type = type;
 	fh->ov.setup_ok = 0;
 
-	mutex_lock(&btv->lock);
 	v4l2_prio_open(&btv->prio, &fh->prio);
 
 	videobuf_queue_sg_init(&fh->cap, &bttv_video_qops,
@@ -3317,13 +3224,13 @@ static int bttv_open(struct file *file)
 			    V4L2_BUF_TYPE_VIDEO_CAPTURE,
 			    V4L2_FIELD_INTERLACED,
 			    sizeof(struct bttv_buffer),
-			    fh, NULL);
+			    fh, &btv->lock);
 	videobuf_queue_sg_init(&fh->vbi, &bttv_vbi_qops,
 			    &btv->c.pci->dev, &btv->s_lock,
 			    V4L2_BUF_TYPE_VBI_CAPTURE,
 			    V4L2_FIELD_SEQ_TB,
 			    sizeof(struct bttv_buffer),
-			    fh, NULL);
+			    fh, &btv->lock);
 	set_tvnorm(btv,btv->tvnorm);
 	set_input(btv, btv->input, btv->tvnorm);
 
@@ -3346,7 +3253,6 @@ static int bttv_open(struct file *file)
 	bttv_vbi_fmt_reset(&fh->vbi_fmt, btv->tvnorm);
 
 	bttv_field_count(btv);
-	mutex_unlock(&btv->lock);
 	return 0;
 }
 
@@ -3355,7 +3261,6 @@ static int bttv_release(struct file *file)
 	struct bttv_fh *fh = file->private_data;
 	struct bttv *btv = fh->btv;
 
-	mutex_lock(&btv->lock);
 	/* turn off overlay */
 	if (check_btres(fh, RESOURCE_OVERLAY))
 		bttv_switch_overlay(btv,fh,NULL);
@@ -3381,14 +3286,8 @@ static int bttv_release(struct file *file)
 
 	/* free stuff */
 
-	/*
-	 * videobuf uses cap.vb_lock - we should avoid holding btv->lock,
-	 * otherwise we may have dead lock conditions
-	 */
-	mutex_unlock(&btv->lock);
 	videobuf_mmap_free(&fh->cap);
 	videobuf_mmap_free(&fh->vbi);
-	mutex_lock(&btv->lock);
 	v4l2_prio_close(&btv->prio, fh->prio);
 	file->private_data = NULL;
 	kfree(fh);
@@ -3398,7 +3297,6 @@ static int bttv_release(struct file *file)
 
 	if (!btv->users)
 		audio_mute(btv, 1);
-	mutex_unlock(&btv->lock);
 
 	return 0;
 }
@@ -3502,11 +3400,8 @@ static int radio_open(struct file *file)
 	if (unlikely(!fh))
 		return -ENOMEM;
 	file->private_data = fh;
-	mutex_lock(&fh->cap.vb_lock);
 	*fh = btv->init;
-	mutex_unlock(&fh->cap.vb_lock);
 
-	mutex_lock(&btv->lock);
 	v4l2_prio_open(&btv->prio, &fh->prio);
 
 	btv->radio_user++;
@@ -3514,7 +3409,6 @@ static int radio_open(struct file *file)
 	bttv_call_all(btv, tuner, s_radio);
 	audio_input(btv,TVAUDIO_INPUT_RADIO);
 
-	mutex_unlock(&btv->lock);
 	return 0;
 }
 
@@ -3524,7 +3418,6 @@ static int radio_release(struct file *file)
 	struct bttv *btv = fh->btv;
 	struct rds_command cmd;
 
-	mutex_lock(&btv->lock);
 	v4l2_prio_close(&btv->prio, fh->prio);
 	file->private_data = NULL;
 	kfree(fh);
@@ -3532,7 +3425,6 @@ static int radio_release(struct file *file)
 	btv->radio_user--;
 
 	bttv_call_all(btv, core, ioctl, RDS_CMD_CLOSE, &cmd);
-	mutex_unlock(&btv->lock);
 
 	return 0;
 }
@@ -3561,7 +3453,6 @@ static int radio_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
 		return -EINVAL;
 	if (0 != t->index)
 		return -EINVAL;
-	mutex_lock(&btv->lock);
 	strcpy(t->name, "Radio");
 	t->type = V4L2_TUNER_RADIO;
 
@@ -3570,8 +3461,6 @@ static int radio_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
 	if (btv->audio_mode_gpio)
 		btv->audio_mode_gpio(btv, t, 0);
 
-	mutex_unlock(&btv->lock);
-
 	return 0;
 }
 
@@ -3692,7 +3581,7 @@ static const struct v4l2_file_operations radio_fops =
 	.open	  = radio_open,
 	.read     = radio_read,
 	.release  = radio_release,
-	.ioctl	  = video_ioctl2,
+	.unlocked_ioctl = video_ioctl2,
 	.poll     = radio_poll,
 };
 
diff --git a/drivers/media/video/bw-qcam.c b/drivers/media/video/bw-qcam.c
index 935e0c9a9674..c1193506131c 100644
--- a/drivers/media/video/bw-qcam.c
+++ b/drivers/media/video/bw-qcam.c
@@ -860,7 +860,7 @@ static ssize_t qcam_read(struct file *file, char __user *buf,
 
 static const struct v4l2_file_operations qcam_fops = {
 	.owner		= THIS_MODULE,
-	.ioctl          = video_ioctl2,
+	.unlocked_ioctl = video_ioctl2,
 	.read		= qcam_read,
 };
 
diff --git a/drivers/media/video/c-qcam.c b/drivers/media/video/c-qcam.c
index 6e4b19698c13..24fc00965a12 100644
--- a/drivers/media/video/c-qcam.c
+++ b/drivers/media/video/c-qcam.c
@@ -718,7 +718,7 @@ static ssize_t qcam_read(struct file *file, char __user *buf,
 
 static const struct v4l2_file_operations qcam_fops = {
 	.owner		= THIS_MODULE,
-	.ioctl		= video_ioctl2,
+	.unlocked_ioctl	= video_ioctl2,
 	.read		= qcam_read,
 };
 
diff --git a/drivers/media/video/cafe_ccic.c b/drivers/media/video/cafe_ccic.c
index 260c666ce931..0dfff50891e4 100644
--- a/drivers/media/video/cafe_ccic.c
+++ b/drivers/media/video/cafe_ccic.c
@@ -1775,7 +1775,7 @@ static const struct v4l2_file_operations cafe_v4l_fops = {
 	.read = cafe_v4l_read,
 	.poll = cafe_v4l_poll,
 	.mmap = cafe_v4l_mmap,
-	.ioctl = video_ioctl2,
+	.unlocked_ioctl = video_ioctl2,
 };
 
 static const struct v4l2_ioctl_ops cafe_v4l_ioctl_ops = {
diff --git a/drivers/media/video/cx18/cx18-alsa-pcm.c b/drivers/media/video/cx18/cx18-alsa-pcm.c
index 8f55692db36d..82d195be9197 100644
--- a/drivers/media/video/cx18/cx18-alsa-pcm.c
+++ b/drivers/media/video/cx18/cx18-alsa-pcm.c
@@ -218,7 +218,13 @@ static int snd_cx18_pcm_capture_close(struct snd_pcm_substream *substream)
 static int snd_cx18_pcm_ioctl(struct snd_pcm_substream *substream,
 		     unsigned int cmd, void *arg)
 {
-	return snd_pcm_lib_ioctl(substream, cmd, arg);
+	struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream);
+	int ret;
+
+	snd_cx18_lock(cxsc);
+	ret = snd_pcm_lib_ioctl(substream, cmd, arg);
+	snd_cx18_unlock(cxsc);
+	return ret;
 }
 
 
diff --git a/drivers/media/video/cx18/cx18-streams.c b/drivers/media/video/cx18/cx18-streams.c
index 9045f1ece0eb..ab461e27d9dd 100644
--- a/drivers/media/video/cx18/cx18-streams.c
+++ b/drivers/media/video/cx18/cx18-streams.c
@@ -41,7 +41,7 @@ static struct v4l2_file_operations cx18_v4l2_enc_fops = {
 	.read = cx18_v4l2_read,
 	.open = cx18_v4l2_open,
 	/* FIXME change to video_ioctl2 if serialization lock can be removed */
-	.ioctl = cx18_v4l2_ioctl,
+	.unlocked_ioctl = cx18_v4l2_ioctl,
 	.release = cx18_v4l2_close,
 	.poll = cx18_v4l2_enc_poll,
 };
diff --git a/drivers/media/video/et61x251/et61x251_core.c b/drivers/media/video/et61x251/et61x251_core.c
index a5cfc76b40b7..bb164099ea2c 100644
--- a/drivers/media/video/et61x251/et61x251_core.c
+++ b/drivers/media/video/et61x251/et61x251_core.c
@@ -2530,7 +2530,7 @@ static const struct v4l2_file_operations et61x251_fops = {
 	.owner = THIS_MODULE,
 	.open =    et61x251_open,
 	.release = et61x251_release,
-	.ioctl =   et61x251_ioctl,
+	.unlocked_ioctl =   et61x251_ioctl,
 	.read =    et61x251_read,
 	.poll =    et61x251_poll,
 	.mmap =    et61x251_mmap,
diff --git a/drivers/media/video/gspca/sonixj.c b/drivers/media/video/gspca/sonixj.c
index 330dadc00106..e23de57e2c73 100644
--- a/drivers/media/video/gspca/sonixj.c
+++ b/drivers/media/video/gspca/sonixj.c
@@ -63,7 +63,10 @@ struct sd {
 #define QUALITY_DEF 80
 	u8 jpegqual;			/* webcam quality */
 
+	u8 reg01;
+	u8 reg17;
 	u8 reg18;
+	u8 flags;
 
 	s8 ag_cnt;
 #define AG_CNT_START 13
@@ -96,6 +99,22 @@ enum sensors {
 	SENSOR_SP80708,
 };
 
+/* device flags */
+#define PDN_INV	1		/* inverse pin S_PWR_DN / sn_xxx tables */
+
+/* sn9c1xx definitions */
+/* register 0x01 */
+#define S_PWR_DN	0x01	/* sensor power down */
+#define S_PDN_INV	0x02	/* inverse pin S_PWR_DN */
+#define V_TX_EN		0x04	/* video transfer enable */
+#define LED		0x08	/* output to pin LED */
+#define SCL_SEL_OD	0x20	/* open-drain mode */
+#define SYS_SEL_48M	0x40	/* system clock 0: 24MHz, 1: 48MHz */
+/* register 0x17 */
+#define MCK_SIZE_MASK	0x1f	/* sensor master clock */
+#define SEN_CLK_EN	0x20	/* enable sensor clock */
+#define DEF_EN		0x80	/* defect pixel by 0: soft, 1: hard */
+
 /* V4L2 controls supported by the driver */
 static void setbrightness(struct gspca_dev *gspca_dev);
 static void setcontrast(struct gspca_dev *gspca_dev);
@@ -1755,141 +1774,6 @@ static void po2030n_probe(struct gspca_dev *gspca_dev)
 	}
 }
 
-static void bridge_init(struct gspca_dev *gspca_dev,
-			  const u8 *sn9c1xx)
-{
-	struct sd *sd = (struct sd *) gspca_dev;
-	u8 reg0102[2];
-	const u8 *reg9a;
-	static const u8 reg9a_def[] =
-		{0x00, 0x40, 0x20, 0x00, 0x00, 0x00};
-	static const u8 reg9a_spec[] =
-		{0x00, 0x40, 0x38, 0x30, 0x00, 0x20};
-	static const u8 regd4[] = {0x60, 0x00, 0x00};
-
-	/* sensor clock already enabled in sd_init */
-	/* reg_w1(gspca_dev, 0xf1, 0x00); */
-	reg_w1(gspca_dev, 0x01, sn9c1xx[1]);
-
-	/* configure gpio */
-	reg0102[0] = sn9c1xx[1];
-	reg0102[1] = sn9c1xx[2];
-	if (gspca_dev->audio)
-		reg0102[1] |= 0x04;	/* keep the audio connection */
-	reg_w(gspca_dev, 0x01, reg0102, 2);
-	reg_w(gspca_dev, 0x08, &sn9c1xx[8], 2);
-	reg_w(gspca_dev, 0x17, &sn9c1xx[0x17], 5);
-	switch (sd->sensor) {
-	case SENSOR_GC0307:
-	case SENSOR_OV7660:
-	case SENSOR_PO1030:
-	case SENSOR_PO2030N:
-	case SENSOR_SOI768:
-	case SENSOR_SP80708:
-		reg9a = reg9a_spec;
-		break;
-	default:
-		reg9a = reg9a_def;
-		break;
-	}
-	reg_w(gspca_dev, 0x9a, reg9a, 6);
-
-	reg_w(gspca_dev, 0xd4, regd4, sizeof regd4);
-
-	reg_w(gspca_dev, 0x03, &sn9c1xx[3], 0x0f);
-
-	switch (sd->sensor) {
-	case SENSOR_ADCM1700:
-		reg_w1(gspca_dev, 0x01, 0x43);
-		reg_w1(gspca_dev, 0x17, 0x62);
-		reg_w1(gspca_dev, 0x01, 0x42);
-		reg_w1(gspca_dev, 0x01, 0x42);
-		break;
-	case SENSOR_GC0307:
-		msleep(50);
-		reg_w1(gspca_dev, 0x01, 0x61);
-		reg_w1(gspca_dev, 0x17, 0x22);
-		reg_w1(gspca_dev, 0x01, 0x60);
-		reg_w1(gspca_dev, 0x01, 0x40);
-		msleep(50);
-		break;
-	case SENSOR_MI0360B:
-		reg_w1(gspca_dev, 0x01, 0x61);
-		reg_w1(gspca_dev, 0x17, 0x60);
-		reg_w1(gspca_dev, 0x01, 0x60);
-		reg_w1(gspca_dev, 0x01, 0x40);
-		break;
-	case SENSOR_MT9V111:
-		reg_w1(gspca_dev, 0x01, 0x61);
-		reg_w1(gspca_dev, 0x17, 0x61);
-		reg_w1(gspca_dev, 0x01, 0x60);
-		reg_w1(gspca_dev, 0x01, 0x40);
-		break;
-	case SENSOR_OM6802:
-		msleep(10);
-		reg_w1(gspca_dev, 0x02, 0x73);
-		reg_w1(gspca_dev, 0x17, 0x60);
-		reg_w1(gspca_dev, 0x01, 0x22);
-		msleep(100);
-		reg_w1(gspca_dev, 0x01, 0x62);
-		reg_w1(gspca_dev, 0x17, 0x64);
-		reg_w1(gspca_dev, 0x17, 0x64);
-		reg_w1(gspca_dev, 0x01, 0x42);
-		msleep(10);
-		reg_w1(gspca_dev, 0x01, 0x42);
-		i2c_w8(gspca_dev, om6802_init0[0]);
-		i2c_w8(gspca_dev, om6802_init0[1]);
-		msleep(15);
-		reg_w1(gspca_dev, 0x02, 0x71);
-		msleep(150);
-		break;
-	case SENSOR_OV7630:
-		reg_w1(gspca_dev, 0x01, 0x61);
-		reg_w1(gspca_dev, 0x17, 0xe2);
-		reg_w1(gspca_dev, 0x01, 0x60);
-		reg_w1(gspca_dev, 0x01, 0x40);
-		break;
-	case SENSOR_OV7648:
-		reg_w1(gspca_dev, 0x01, 0x63);
-		reg_w1(gspca_dev, 0x17, 0x20);
-		reg_w1(gspca_dev, 0x01, 0x62);
-		reg_w1(gspca_dev, 0x01, 0x42);
-		break;
-	case SENSOR_PO1030:
-	case SENSOR_SOI768:
-		reg_w1(gspca_dev, 0x01, 0x61);
-		reg_w1(gspca_dev, 0x17, 0x20);
-		reg_w1(gspca_dev, 0x01, 0x60);
-		reg_w1(gspca_dev, 0x01, 0x40);
-		break;
-	case SENSOR_PO2030N:
-	case SENSOR_OV7660:
-		reg_w1(gspca_dev, 0x01, 0x63);
-		reg_w1(gspca_dev, 0x17, 0x20);
-		reg_w1(gspca_dev, 0x01, 0x62);
-		reg_w1(gspca_dev, 0x01, 0x42);
-		break;
-	case SENSOR_SP80708:
-		reg_w1(gspca_dev, 0x01, 0x63);
-		reg_w1(gspca_dev, 0x17, 0x20);
-		reg_w1(gspca_dev, 0x01, 0x62);
-		reg_w1(gspca_dev, 0x01, 0x42);
-		msleep(100);
-		reg_w1(gspca_dev, 0x02, 0x62);
-		break;
-	default:
-/*	case SENSOR_HV7131R: */
-/*	case SENSOR_MI0360: */
-/*	case SENSOR_MO4000: */
-		reg_w1(gspca_dev, 0x01, 0x43);
-		reg_w1(gspca_dev, 0x17, 0x61);
-		reg_w1(gspca_dev, 0x01, 0x42);
-		if (sd->sensor == SENSOR_HV7131R)
-			hv7131r_probe(gspca_dev);
-		break;
-	}
-}
-
 /* this function is called at probe time */
 static int sd_config(struct gspca_dev *gspca_dev,
 			const struct usb_device_id *id)
@@ -1898,7 +1782,8 @@ static int sd_config(struct gspca_dev *gspca_dev,
 	struct cam *cam;
 
 	sd->bridge = id->driver_info >> 16;
-	sd->sensor = id->driver_info;
+	sd->sensor = id->driver_info >> 8;
+	sd->flags = id->driver_info;
 
 	cam = &gspca_dev->cam;
 	if (sd->sensor == SENSOR_ADCM1700) {
@@ -1929,7 +1814,7 @@ static int sd_init(struct gspca_dev *gspca_dev)
 	/* setup a selector by bridge */
 	reg_w1(gspca_dev, 0xf1, 0x01);
 	reg_r(gspca_dev, 0x00, 1);
-	reg_w1(gspca_dev, 0xf1, gspca_dev->usb_buf[0]);
+	reg_w1(gspca_dev, 0xf1, 0x00);
 	reg_r(gspca_dev, 0x00, 1);		/* get sonix chip id */
 	regF1 = gspca_dev->usb_buf[0];
 	if (gspca_dev->usb_err < 0)
@@ -2423,10 +2308,17 @@ static int sd_start(struct gspca_dev *gspca_dev)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	int i;
-	u8 reg1, reg17;
+	u8 reg01, reg17;
+	u8 reg0102[2];
 	const u8 *sn9c1xx;
 	const u8 (*init)[8];
+	const u8 *reg9a;
 	int mode;
+	static const u8 reg9a_def[] =
+		{0x00, 0x40, 0x20, 0x00, 0x00, 0x00};
+	static const u8 reg9a_spec[] =
+		{0x00, 0x40, 0x38, 0x30, 0x00, 0x20};
+	static const u8 regd4[] = {0x60, 0x00, 0x00};
 	static const u8 C0[] = { 0x2d, 0x2d, 0x3a, 0x05, 0x04, 0x3f };
 	static const u8 CA[] = { 0x28, 0xd8, 0x14, 0xec };
 	static const u8 CA_adcm1700[] =
@@ -2448,7 +2340,85 @@ static int sd_start(struct gspca_dev *gspca_dev)
 
 	/* initialize the bridge */
 	sn9c1xx = sn_tb[sd->sensor];
-	bridge_init(gspca_dev, sn9c1xx);
+
+	/* sensor clock already enabled in sd_init */
+	/* reg_w1(gspca_dev, 0xf1, 0x00); */
+	reg01 = sn9c1xx[1];
+	if (sd->flags & PDN_INV)
+		reg01 ^= S_PDN_INV;		/* power down inverted */
+	reg_w1(gspca_dev, 0x01, reg01);
+
+	/* configure gpio */
+	reg0102[0] = reg01;
+	reg0102[1] = sn9c1xx[2];
+	if (gspca_dev->audio)
+		reg0102[1] |= 0x04;	/* keep the audio connection */
+	reg_w(gspca_dev, 0x01, reg0102, 2);
+	reg_w(gspca_dev, 0x08, &sn9c1xx[8], 2);
+	reg_w(gspca_dev, 0x17, &sn9c1xx[0x17], 5);
+	switch (sd->sensor) {
+	case SENSOR_GC0307:
+	case SENSOR_OV7660:
+	case SENSOR_PO1030:
+	case SENSOR_PO2030N:
+	case SENSOR_SOI768:
+	case SENSOR_SP80708:
+		reg9a = reg9a_spec;
+		break;
+	default:
+		reg9a = reg9a_def;
+		break;
+	}
+	reg_w(gspca_dev, 0x9a, reg9a, 6);
+
+	reg_w(gspca_dev, 0xd4, regd4, sizeof regd4);
+
+	reg_w(gspca_dev, 0x03, &sn9c1xx[3], 0x0f);
+
+	reg17 = sn9c1xx[0x17];
+	switch (sd->sensor) {
+	case SENSOR_GC0307:
+		msleep(50);		/*fixme: is it useful? */
+		break;
+	case SENSOR_OM6802:
+		msleep(10);
+		reg_w1(gspca_dev, 0x02, 0x73);
+		reg17 |= SEN_CLK_EN;
+		reg_w1(gspca_dev, 0x17, reg17);
+		reg_w1(gspca_dev, 0x01, 0x22);
+		msleep(100);
+		reg01 = SCL_SEL_OD | S_PDN_INV;
+		reg17 &= MCK_SIZE_MASK;
+		reg17 |= 0x04;		/* clock / 4 */
+		break;
+	}
+	reg01 |= SYS_SEL_48M;
+	reg_w1(gspca_dev, 0x01, reg01);
+	reg17 |= SEN_CLK_EN;
+	reg_w1(gspca_dev, 0x17, reg17);
+	reg01 &= ~S_PWR_DN;		/* sensor power on */
+	reg_w1(gspca_dev, 0x01, reg01);
+	reg01 &= ~SYS_SEL_48M;
+	reg_w1(gspca_dev, 0x01, reg01);
+
+	switch (sd->sensor) {
+	case SENSOR_HV7131R:
+		hv7131r_probe(gspca_dev);	/*fixme: is it useful? */
+		break;
+	case SENSOR_OM6802:
+		msleep(10);
+		reg_w1(gspca_dev, 0x01, reg01);
+		i2c_w8(gspca_dev, om6802_init0[0]);
+		i2c_w8(gspca_dev, om6802_init0[1]);
+		msleep(15);
+		reg_w1(gspca_dev, 0x02, 0x71);
+		msleep(150);
+		break;
+	case SENSOR_SP80708:
+		msleep(100);
+		reg_w1(gspca_dev, 0x02, 0x62);
+		break;
+	}
 
 	/* initialize the sensor */
 	i2c_w_seq(gspca_dev, sensor_init[sd->sensor]);
@@ -2476,30 +2446,11 @@ static int sd_start(struct gspca_dev *gspca_dev)
 	}
 	reg_w1(gspca_dev, 0x18, sn9c1xx[0x18]);
 	switch (sd->sensor) {
-	case SENSOR_GC0307:
-		reg17 = 0xa2;
-		break;
-	case SENSOR_MT9V111:
-	case SENSOR_MI0360B:
-		reg17 = 0xe0;
-		break;
-	case SENSOR_ADCM1700:
-	case SENSOR_OV7630:
-		reg17 = 0xe2;
-		break;
-	case SENSOR_OV7648:
-		reg17 = 0x20;
-		break;
-	case SENSOR_OV7660:
-	case SENSOR_SOI768:
-		reg17 = 0xa0;
-		break;
-	case SENSOR_PO1030:
-	case SENSOR_PO2030N:
-		reg17 = 0xa0;
+	case SENSOR_OM6802:
+/*	case SENSOR_OV7648:		* fixme: sometimes */
 		break;
 	default:
-		reg17 = 0x60;
+		reg17 |= DEF_EN;
 		break;
 	}
 	reg_w1(gspca_dev, 0x17, reg17);
@@ -2546,95 +2497,67 @@ static int sd_start(struct gspca_dev *gspca_dev)
 
 	init = NULL;
 	mode = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
-	if (mode)
-		reg1 = 0x46;	/* 320x240: clk 48Mhz, video trf enable */
-	else
-		reg1 = 0x06;	/* 640x480: clk 24Mhz, video trf enable */
-	reg17 = 0x61;		/* 0x:20: enable sensor clock */
+	reg01 |= SYS_SEL_48M | V_TX_EN;
+	reg17 &= ~MCK_SIZE_MASK;
+	reg17 |= 0x02;			/* clock / 2 */
 	switch (sd->sensor) {
 	case SENSOR_ADCM1700:
 		init = adcm1700_sensor_param1;
-		reg1 = 0x46;
-		reg17 = 0xe2;
 		break;
 	case SENSOR_GC0307:
 		init = gc0307_sensor_param1;
-		reg17 = 0xa2;
-		reg1 = 0x44;
+		break;
+	case SENSOR_HV7131R:
+	case SENSOR_MI0360:
+		if (mode)
+			reg01 |= SYS_SEL_48M;	/* 320x240: clk 48Mhz */
+		else
+			reg01 &= ~SYS_SEL_48M;	/* 640x480: clk 24Mhz */
+		reg17 &= ~MCK_SIZE_MASK;
+		reg17 |= 0x01;			/* clock / 1 */
 		break;
 	case SENSOR_MI0360B:
 		init = mi0360b_sensor_param1;
-		reg1 &= ~0x02;		/* don't inverse pin S_PWR_DN */
-		reg17 = 0xe2;
 		break;
 	case SENSOR_MO4000:
-		if (mode) {
-/*			reg1 = 0x46;	 * 320 clk 48Mhz 60fp/s */
-			reg1 = 0x06;	/* clk 24Mz */
-		} else {
-			reg17 = 0x22;	/* 640 MCKSIZE */
-/*			reg1 = 0x06;	 * 640 clk 24Mz (done) */
+		if (mode) {			/* if 320x240 */
+			reg01 &= ~SYS_SEL_48M;	/* clk 24Mz */
+			reg17 &= ~MCK_SIZE_MASK;
+			reg17 |= 0x01;		/* clock / 1 */
 		}
 		break;
 	case SENSOR_MT9V111:
 		init = mt9v111_sensor_param1;
-		if (mode) {
-			reg1 = 0x04;	/* 320 clk 48Mhz */
-		} else {
-/*			reg1 = 0x06;	 * 640 clk 24Mz (done) */
-			reg17 = 0xc2;
-		}
 		break;
 	case SENSOR_OM6802:
 		init = om6802_sensor_param1;
-		reg17 = 0x64;		/* 640 MCKSIZE */
+		if (!mode) {			/* if 640x480 */
+			reg17 &= ~MCK_SIZE_MASK;
+			reg17 |= 0x01;		/* clock / 4 */
+		}
 		break;
 	case SENSOR_OV7630:
 		init = ov7630_sensor_param1;
-		reg17 = 0xe2;
-		reg1 = 0x44;
 		break;
 	case SENSOR_OV7648:
 		init = ov7648_sensor_param1;
-		reg17 = 0x21;
-/*		reg1 = 0x42;		 * 42 - 46? */
+		reg17 &= ~MCK_SIZE_MASK;
+		reg17 |= 0x01;			/* clock / 1 */
 		break;
 	case SENSOR_OV7660:
 		init = ov7660_sensor_param1;
-		if (sd->bridge == BRIDGE_SN9C120) {
-			if (mode) {		/* 320x240 - 160x120 */
-				reg17 = 0xa2;
-				reg1 = 0x44;	/* 48 Mhz, video trf eneble */
-			}
-		} else {
-			reg17 = 0x22;
-			reg1 = 0x06;	/* 24 Mhz, video trf eneble
-					 * inverse power down */
-		}
 		break;
 	case SENSOR_PO1030:
 		init = po1030_sensor_param1;
-		reg17 = 0xa2;
-		reg1 = 0x44;
 		break;
 	case SENSOR_PO2030N:
 		init = po2030n_sensor_param1;
-		reg1 = 0x46;
-		reg17 = 0xa2;
 		break;
 	case SENSOR_SOI768:
 		init = soi768_sensor_param1;
-		reg1 = 0x44;
-		reg17 = 0xa2;
 		break;
 	case SENSOR_SP80708:
 		init = sp80708_sensor_param1;
-		if (mode) {
-/*??			reg1 = 0x04;	 * 320 clk 48Mhz */
-		} else {
-			reg1 = 0x46;	 /* 640 clk 48Mz */
-			reg17 = 0xa2;
-		}
 		break;
 	}
 
@@ -2684,7 +2607,9 @@ static int sd_start(struct gspca_dev *gspca_dev)
 	setjpegqual(gspca_dev);
 
 	reg_w1(gspca_dev, 0x17, reg17);
-	reg_w1(gspca_dev, 0x01, reg1);
+	reg_w1(gspca_dev, 0x01, reg01);
+	sd->reg01 = reg01;
+	sd->reg17 = reg17;
 
 	sethvflip(gspca_dev);
 	setbrightness(gspca_dev);
@@ -2706,41 +2631,64 @@ static void sd_stopN(struct gspca_dev *gspca_dev)
 		{ 0xa1, 0x21, 0x76, 0x20, 0x00, 0x00, 0x00, 0x10 };
 	static const u8 stopsoi768[] =
 		{ 0xa1, 0x21, 0x12, 0x80, 0x00, 0x00, 0x00, 0x10 };
-	u8 data;
-	const u8 *sn9c1xx;
+	u8 reg01;
+	u8 reg17;
 
-	data = 0x0b;
+	reg01 = sd->reg01;
+	reg17 = sd->reg17 & ~SEN_CLK_EN;
 	switch (sd->sensor) {
+	case SENSOR_ADCM1700:
 	case SENSOR_GC0307:
-		data = 0x29;
+	case SENSOR_PO2030N:
+	case SENSOR_SP80708:
+		reg01 |= LED;
+		reg_w1(gspca_dev, 0x01, reg01);
+		reg01 &= ~(LED | V_TX_EN);
+		reg_w1(gspca_dev, 0x01, reg01);
+/*		reg_w1(gspca_dev, 0x02, 0x??);	 * LED off ? */
 		break;
 	case SENSOR_HV7131R:
+		reg01 &= ~V_TX_EN;
+		reg_w1(gspca_dev, 0x01, reg01);
 		i2c_w8(gspca_dev, stophv7131);
-		data = 0x2b;
 		break;
 	case SENSOR_MI0360:
 	case SENSOR_MI0360B:
+		reg01 &= ~V_TX_EN;
+		reg_w1(gspca_dev, 0x01, reg01);
+/*		reg_w1(gspca_dev, 0x02, 0x40);	  * LED off ? */
 		i2c_w8(gspca_dev, stopmi0360);
-		data = 0x29;
 		break;
-	case SENSOR_OV7648:
-		i2c_w8(gspca_dev, stopov7648);
-		/* fall thru */
 	case SENSOR_MT9V111:
-	case SENSOR_OV7630:
+	case SENSOR_OM6802:
 	case SENSOR_PO1030:
-		data = 0x29;
+		reg01 &= ~V_TX_EN;
+		reg_w1(gspca_dev, 0x01, reg01);
+		break;
+	case SENSOR_OV7630:
+	case SENSOR_OV7648:
+		reg01 &= ~V_TX_EN;
+		reg_w1(gspca_dev, 0x01, reg01);
+		i2c_w8(gspca_dev, stopov7648);
+		break;
+	case SENSOR_OV7660:
+		reg01 &= ~V_TX_EN;
+		reg_w1(gspca_dev, 0x01, reg01);
 		break;
 	case SENSOR_SOI768:
 		i2c_w8(gspca_dev, stopsoi768);
-		data = 0x29;
 		break;
 	}
-	sn9c1xx = sn_tb[sd->sensor];
-	reg_w1(gspca_dev, 0x01, sn9c1xx[1]);
-	reg_w1(gspca_dev, 0x17, sn9c1xx[0x17]);
-	reg_w1(gspca_dev, 0x01, sn9c1xx[1]);
-	reg_w1(gspca_dev, 0x01, data);
+
+	reg01 |= SCL_SEL_OD;
+	reg_w1(gspca_dev, 0x01, reg01);
+	reg01 |= S_PWR_DN;		/* sensor power down */
+	reg_w1(gspca_dev, 0x01, reg01);
+	reg_w1(gspca_dev, 0x17, reg17);
+	reg01 &= ~SYS_SEL_48M;		/* clock 24MHz */
+	reg_w1(gspca_dev, 0x01, reg01);
+	reg01 |= LED;
+	reg_w1(gspca_dev, 0x01, reg01);
 	/* Don't disable sensor clock as that disables the button on the cam */
 	/* reg_w1(gspca_dev, 0xf1, 0x01); */
 }
@@ -2954,14 +2902,18 @@ static const struct sd_desc sd_desc = {
 /* -- module initialisation -- */
 #define BS(bridge, sensor) \
 	.driver_info = (BRIDGE_ ## bridge << 16) \
-			| SENSOR_ ## sensor
+			| (SENSOR_ ## sensor << 8)
+#define BSF(bridge, sensor, flags) \
+	.driver_info = (BRIDGE_ ## bridge << 16) \
+			| (SENSOR_ ## sensor << 8) \
+			| (flags)
 static const __devinitdata struct usb_device_id device_table[] = {
 #if !defined CONFIG_USB_SN9C102 && !defined CONFIG_USB_SN9C102_MODULE
 	{USB_DEVICE(0x0458, 0x7025), BS(SN9C120, MI0360)},
 	{USB_DEVICE(0x0458, 0x702e), BS(SN9C120, OV7660)},
 #endif
-	{USB_DEVICE(0x045e, 0x00f5), BS(SN9C105, OV7660)},
-	{USB_DEVICE(0x045e, 0x00f7), BS(SN9C105, OV7660)},
+	{USB_DEVICE(0x045e, 0x00f5), BSF(SN9C105, OV7660, PDN_INV)},
+	{USB_DEVICE(0x045e, 0x00f7), BSF(SN9C105, OV7660, PDN_INV)},
 	{USB_DEVICE(0x0471, 0x0327), BS(SN9C105, MI0360)},
 	{USB_DEVICE(0x0471, 0x0328), BS(SN9C105, MI0360)},
 	{USB_DEVICE(0x0471, 0x0330), BS(SN9C105, MI0360)},
diff --git a/drivers/media/video/meye.c b/drivers/media/video/meye.c
index 2be23bccd3c8..48d2c2419c13 100644
--- a/drivers/media/video/meye.c
+++ b/drivers/media/video/meye.c
@@ -1659,7 +1659,7 @@ static const struct v4l2_file_operations meye_fops = {
 	.open		= meye_open,
 	.release	= meye_release,
 	.mmap		= meye_mmap,
-	.ioctl		= video_ioctl2,
+	.unlocked_ioctl	= video_ioctl2,
 	.poll		= meye_poll,
 };
 
@@ -1831,12 +1831,6 @@ static int __devinit meye_probe(struct pci_dev *pcidev,
 	msleep(1);
 	mchip_set(MCHIP_MM_INTA, MCHIP_MM_INTA_HIC_1_MASK);
 
-	if (video_register_device(meye.vdev, VFL_TYPE_GRABBER,
-				  video_nr) < 0) {
-		v4l2_err(v4l2_dev, "video_register_device failed\n");
-		goto outvideoreg;
-	}
-
 	mutex_init(&meye.lock);
 	init_waitqueue_head(&meye.proc_list);
 	meye.brightness = 32 << 10;
@@ -1858,6 +1852,12 @@ static int __devinit meye_probe(struct pci_dev *pcidev,
 	sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAPICTURE, 0);
 	sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAAGC, 48);
 
+	if (video_register_device(meye.vdev, VFL_TYPE_GRABBER,
+				  video_nr) < 0) {
+		v4l2_err(v4l2_dev, "video_register_device failed\n");
+		goto outvideoreg;
+	}
+
 	v4l2_info(v4l2_dev, "Motion Eye Camera Driver v%s.\n",
 	       MEYE_DRIVER_VERSION);
 	v4l2_info(v4l2_dev, "mchip KL5A72002 rev. %d, base %lx, irq %d\n",
diff --git a/drivers/media/video/pms.c b/drivers/media/video/pms.c
index 7129b50757db..7551907f8c28 100644
--- a/drivers/media/video/pms.c
+++ b/drivers/media/video/pms.c
@@ -932,7 +932,7 @@ static ssize_t pms_read(struct file *file, char __user *buf,
 
 static const struct v4l2_file_operations pms_fops = {
 	.owner		= THIS_MODULE,
-	.ioctl		= video_ioctl2,
+	.unlocked_ioctl	= video_ioctl2,
 	.read           = pms_read,
 };
 
diff --git a/drivers/media/video/sh_vou.c b/drivers/media/video/sh_vou.c
index 4e5a8cf76ded..07cf0c6c7c1f 100644
--- a/drivers/media/video/sh_vou.c
+++ b/drivers/media/video/sh_vou.c
@@ -75,6 +75,7 @@ struct sh_vou_device {
 	int pix_idx;
 	struct videobuf_buffer *active;
 	enum sh_vou_status status;
+	struct mutex fop_lock;
 };
 
 struct sh_vou_file {
@@ -235,7 +236,7 @@ static void free_buffer(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 	vb->state = VIDEOBUF_NEEDS_INIT;
 }
 
-/* Locking: caller holds vq->vb_lock mutex */
+/* Locking: caller holds fop_lock mutex */
 static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count,
 			    unsigned int *size)
 {
@@ -257,7 +258,7 @@ static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count,
 	return 0;
 }
 
-/* Locking: caller holds vq->vb_lock mutex */
+/* Locking: caller holds fop_lock mutex */
 static int sh_vou_buf_prepare(struct videobuf_queue *vq,
 			      struct videobuf_buffer *vb,
 			      enum v4l2_field field)
@@ -306,7 +307,7 @@ static int sh_vou_buf_prepare(struct videobuf_queue *vq,
 	return 0;
 }
 
-/* Locking: caller holds vq->vb_lock mutex and vq->irqlock spinlock */
+/* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
 static void sh_vou_buf_queue(struct videobuf_queue *vq,
 			     struct videobuf_buffer *vb)
 {
@@ -1190,7 +1191,7 @@ static int sh_vou_open(struct file *file)
 				       V4L2_BUF_TYPE_VIDEO_OUTPUT,
 				       V4L2_FIELD_NONE,
 				       sizeof(struct videobuf_buffer), vdev,
-				       NULL);
+				       &vou_dev->fop_lock);
 
 	return 0;
 }
@@ -1292,7 +1293,7 @@ static const struct v4l2_file_operations sh_vou_fops = {
 	.owner		= THIS_MODULE,
 	.open		= sh_vou_open,
 	.release	= sh_vou_release,
-	.ioctl		= video_ioctl2,
+	.unlocked_ioctl	= video_ioctl2,
 	.mmap		= sh_vou_mmap,
 	.poll		= sh_vou_poll,
 };
@@ -1331,6 +1332,7 @@ static int __devinit sh_vou_probe(struct platform_device *pdev)
 
 	INIT_LIST_HEAD(&vou_dev->queue);
 	spin_lock_init(&vou_dev->lock);
+	mutex_init(&vou_dev->fop_lock);
 	atomic_set(&vou_dev->use_count, 0);
 	vou_dev->pdata = vou_pdata;
 	vou_dev->status = SH_VOU_IDLE;
@@ -1388,6 +1390,7 @@ static int __devinit sh_vou_probe(struct platform_device *pdev)
 		vdev->tvnorms |= V4L2_STD_PAL;
 	vdev->v4l2_dev = &vou_dev->v4l2_dev;
 	vdev->release = video_device_release;
+	vdev->lock = &vou_dev->fop_lock;
 
 	vou_dev->vdev = vdev;
 	video_set_drvdata(vdev, vou_dev);
diff --git a/drivers/media/video/sn9c102/sn9c102_core.c b/drivers/media/video/sn9c102/sn9c102_core.c
index 28e19daadec9..f49fbfb7dc13 100644
--- a/drivers/media/video/sn9c102/sn9c102_core.c
+++ b/drivers/media/video/sn9c102/sn9c102_core.c
@@ -3238,7 +3238,7 @@ static const struct v4l2_file_operations sn9c102_fops = {
 	.owner = THIS_MODULE,
 	.open = sn9c102_open,
 	.release = sn9c102_release,
-	.ioctl = sn9c102_ioctl,
+	.unlocked_ioctl = sn9c102_ioctl,
 	.read = sn9c102_read,
 	.poll = sn9c102_poll,
 	.mmap = sn9c102_mmap,
diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c
index f169f7736677..59f8a9ad3796 100644
--- a/drivers/media/video/uvc/uvc_ctrl.c
+++ b/drivers/media/video/uvc/uvc_ctrl.c
@@ -785,7 +785,7 @@ static void __uvc_find_control(struct uvc_entity *entity, __u32 v4l2_id,
 	}
 }
 
-struct uvc_control *uvc_find_control(struct uvc_video_chain *chain,
+static struct uvc_control *uvc_find_control(struct uvc_video_chain *chain,
 	__u32 v4l2_id, struct uvc_control_mapping **mapping)
 {
 	struct uvc_control *ctrl = NULL;
@@ -944,6 +944,52 @@ done:
 	return ret;
 }
 
+/*
+ * Mapping V4L2 controls to UVC controls can be straighforward if done well.
+ * Most of the UVC controls exist in V4L2, and can be mapped directly. Some
+ * must be grouped (for instance the Red Balance, Blue Balance and Do White
+ * Balance V4L2 controls use the White Balance Component UVC control) or
+ * otherwise translated. The approach we take here is to use a translation
+ * table for the controls that can be mapped directly, and handle the others
+ * manually.
+ */
+int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
+	struct v4l2_querymenu *query_menu)
+{
+	struct uvc_menu_info *menu_info;
+	struct uvc_control_mapping *mapping;
+	struct uvc_control *ctrl;
+	u32 index = query_menu->index;
+	u32 id = query_menu->id;
+	int ret;
+
+	memset(query_menu, 0, sizeof(*query_menu));
+	query_menu->id = id;
+	query_menu->index = index;
+
+	ret = mutex_lock_interruptible(&chain->ctrl_mutex);
+	if (ret < 0)
+		return -ERESTARTSYS;
+
+	ctrl = uvc_find_control(chain, query_menu->id, &mapping);
+	if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) {
+		ret = -EINVAL;
+		goto done;
+	}
+
+	if (query_menu->index >= mapping->menu_count) {
+		ret = -EINVAL;
+		goto done;
+	}
+
+	menu_info = &mapping->menu_info[query_menu->index];
+	strlcpy(query_menu->name, menu_info->name, sizeof query_menu->name);
+
+done:
+	mutex_unlock(&chain->ctrl_mutex);
+	return ret;
+}
+
 
 /* --------------------------------------------------------------------------
  * Control transactions
diff --git a/drivers/media/video/uvc/uvc_queue.c b/drivers/media/video/uvc/uvc_queue.c
index ed6d5449741c..f14581bd707f 100644
--- a/drivers/media/video/uvc/uvc_queue.c
+++ b/drivers/media/video/uvc/uvc_queue.c
@@ -90,6 +90,39 @@ void uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
 }
 
 /*
+ * Free the video buffers.
+ *
+ * This function must be called with the queue lock held.
+ */
+static int __uvc_free_buffers(struct uvc_video_queue *queue)
+{
+	unsigned int i;
+
+	for (i = 0; i < queue->count; ++i) {
+		if (queue->buffer[i].vma_use_count != 0)
+			return -EBUSY;
+	}
+
+	if (queue->count) {
+		vfree(queue->mem);
+		queue->count = 0;
+	}
+
+	return 0;
+}
+
+int uvc_free_buffers(struct uvc_video_queue *queue)
+{
+	int ret;
+
+	mutex_lock(&queue->mutex);
+	ret = __uvc_free_buffers(queue);
+	mutex_unlock(&queue->mutex);
+
+	return ret;
+}
+
+/*
  * Allocate the video buffers.
  *
  * Pages are reserved to make sure they will not be swapped, as they will be
@@ -110,7 +143,7 @@ int uvc_alloc_buffers(struct uvc_video_queue *queue, unsigned int nbuffers,
 
 	mutex_lock(&queue->mutex);
 
-	if ((ret = uvc_free_buffers(queue)) < 0)
+	if ((ret = __uvc_free_buffers(queue)) < 0)
 		goto done;
 
 	/* Bail out if no buffers should be allocated. */
@@ -152,28 +185,6 @@ done:
 }
 
 /*
- * Free the video buffers.
- *
- * This function must be called with the queue lock held.
- */
-int uvc_free_buffers(struct uvc_video_queue *queue)
-{
-	unsigned int i;
-
-	for (i = 0; i < queue->count; ++i) {
-		if (queue->buffer[i].vma_use_count != 0)
-			return -EBUSY;
-	}
-
-	if (queue->count) {
-		vfree(queue->mem);
-		queue->count = 0;
-	}
-
-	return 0;
-}
-
-/*
  * Check if buffers have been allocated.
  */
 int uvc_queue_allocated(struct uvc_video_queue *queue)
@@ -369,6 +380,82 @@ done:
 }
 
 /*
+ * VMA operations.
+ */
+static void uvc_vm_open(struct vm_area_struct *vma)
+{
+	struct uvc_buffer *buffer = vma->vm_private_data;
+	buffer->vma_use_count++;
+}
+
+static void uvc_vm_close(struct vm_area_struct *vma)
+{
+	struct uvc_buffer *buffer = vma->vm_private_data;
+	buffer->vma_use_count--;
+}
+
+static const struct vm_operations_struct uvc_vm_ops = {
+	.open		= uvc_vm_open,
+	.close		= uvc_vm_close,
+};
+
+/*
+ * Memory-map a video buffer.
+ *
+ * This function implements video buffers memory mapping and is intended to be
+ * used by the device mmap handler.
+ */
+int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma)
+{
+	struct uvc_buffer *uninitialized_var(buffer);
+	struct page *page;
+	unsigned long addr, start, size;
+	unsigned int i;
+	int ret = 0;
+
+	start = vma->vm_start;
+	size = vma->vm_end - vma->vm_start;
+
+	mutex_lock(&queue->mutex);
+
+	for (i = 0; i < queue->count; ++i) {
+		buffer = &queue->buffer[i];
+		if ((buffer->buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
+			break;
+	}
+
+	if (i == queue->count || size != queue->buf_size) {
+		ret = -EINVAL;
+		goto done;
+	}
+
+	/*
+	 * VM_IO marks the area as being an mmaped region for I/O to a
+	 * device. It also prevents the region from being core dumped.
+	 */
+	vma->vm_flags |= VM_IO;
+
+	addr = (unsigned long)queue->mem + buffer->buf.m.offset;
+	while (size > 0) {
+		page = vmalloc_to_page((void *)addr);
+		if ((ret = vm_insert_page(vma, start, page)) < 0)
+			goto done;
+
+		start += PAGE_SIZE;
+		addr += PAGE_SIZE;
+		size -= PAGE_SIZE;
+	}
+
+	vma->vm_ops = &uvc_vm_ops;
+	vma->vm_private_data = buffer;
+	uvc_vm_open(vma);
+
+done:
+	mutex_unlock(&queue->mutex);
+	return ret;
+}
+
+/*
  * Poll the video queue.
  *
  * This function implements video queue polling and is intended to be used by
diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c
index 6d15de9b5204..8cf61e8a634f 100644
--- a/drivers/media/video/uvc/uvc_v4l2.c
+++ b/drivers/media/video/uvc/uvc_v4l2.c
@@ -101,40 +101,6 @@ done:
  */
 
 /*
- * Mapping V4L2 controls to UVC controls can be straighforward if done well.
- * Most of the UVC controls exist in V4L2, and can be mapped directly. Some
- * must be grouped (for instance the Red Balance, Blue Balance and Do White
- * Balance V4L2 controls use the White Balance Component UVC control) or
- * otherwise translated. The approach we take here is to use a translation
- * table for the controls that can be mapped directly, and handle the others
- * manually.
- */
-static int uvc_v4l2_query_menu(struct uvc_video_chain *chain,
-	struct v4l2_querymenu *query_menu)
-{
-	struct uvc_menu_info *menu_info;
-	struct uvc_control_mapping *mapping;
-	struct uvc_control *ctrl;
-	u32 index = query_menu->index;
-	u32 id = query_menu->id;
-
-	ctrl = uvc_find_control(chain, query_menu->id, &mapping);
-	if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU)
-		return -EINVAL;
-
-	if (query_menu->index >= mapping->menu_count)
-		return -EINVAL;
-
-	memset(query_menu, 0, sizeof(*query_menu));
-	query_menu->id = id;
-	query_menu->index = index;
-
-	menu_info = &mapping->menu_info[query_menu->index];
-	strlcpy(query_menu->name, menu_info->name, sizeof query_menu->name);
-	return 0;
-}
-
-/*
  * Find the frame interval closest to the requested frame interval for the
  * given frame format and size. This should be done by the device as part of
  * the Video Probe and Commit negotiation, but some hardware don't implement
@@ -260,12 +226,14 @@ static int uvc_v4l2_try_format(struct uvc_streaming *stream,
 	 * developers test their webcams with the Linux driver as well as with
 	 * the Windows driver).
 	 */
+	mutex_lock(&stream->mutex);
 	if (stream->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS)
 		probe->dwMaxVideoFrameSize =
 			stream->ctrl.dwMaxVideoFrameSize;
 
 	/* Probe the device. */
 	ret = uvc_probe_video(stream, probe);
+	mutex_unlock(&stream->mutex);
 	if (ret < 0)
 		goto done;
 
@@ -289,14 +257,21 @@ done:
 static int uvc_v4l2_get_format(struct uvc_streaming *stream,
 	struct v4l2_format *fmt)
 {
-	struct uvc_format *format = stream->cur_format;
-	struct uvc_frame *frame = stream->cur_frame;
+	struct uvc_format *format;
+	struct uvc_frame *frame;
+	int ret = 0;
 
 	if (fmt->type != stream->type)
 		return -EINVAL;
 
-	if (format == NULL || frame == NULL)
-		return -EINVAL;
+	mutex_lock(&stream->mutex);
+	format = stream->cur_format;
+	frame = stream->cur_frame;
+
+	if (format == NULL || frame == NULL) {
+		ret = -EINVAL;
+		goto done;
+	}
 
 	fmt->fmt.pix.pixelformat = format->fcc;
 	fmt->fmt.pix.width = frame->wWidth;
@@ -307,7 +282,9 @@ static int uvc_v4l2_get_format(struct uvc_streaming *stream,
 	fmt->fmt.pix.colorspace = format->colorspace;
 	fmt->fmt.pix.priv = 0;
 
-	return 0;
+done:
+	mutex_unlock(&stream->mutex);
+	return ret;
 }
 
 static int uvc_v4l2_set_format(struct uvc_streaming *stream,
@@ -321,18 +298,24 @@ static int uvc_v4l2_set_format(struct uvc_streaming *stream,
 	if (fmt->type != stream->type)
 		return -EINVAL;
 
-	if (uvc_queue_allocated(&stream->queue))
-		return -EBUSY;
-
 	ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame);
 	if (ret < 0)
 		return ret;
 
+	mutex_lock(&stream->mutex);
+
+	if (uvc_queue_allocated(&stream->queue)) {
+		ret = -EBUSY;
+		goto done;
+	}
+
 	memcpy(&stream->ctrl, &probe, sizeof probe);
 	stream->cur_format = format;
 	stream->cur_frame = frame;
 
-	return 0;
+done:
+	mutex_unlock(&stream->mutex);
+	return ret;
 }
 
 static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream,
@@ -343,7 +326,10 @@ static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream,
 	if (parm->type != stream->type)
 		return -EINVAL;
 
+	mutex_lock(&stream->mutex);
 	numerator = stream->ctrl.dwFrameInterval;
+	mutex_unlock(&stream->mutex);
+
 	denominator = 10000000;
 	uvc_simplify_fraction(&numerator, &denominator, 8, 333);
 
@@ -370,7 +356,6 @@ static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream,
 static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream,
 		struct v4l2_streamparm *parm)
 {
-	struct uvc_frame *frame = stream->cur_frame;
 	struct uvc_streaming_control probe;
 	struct v4l2_fract timeperframe;
 	uint32_t interval;
@@ -379,28 +364,36 @@ static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream,
 	if (parm->type != stream->type)
 		return -EINVAL;
 
-	if (uvc_queue_streaming(&stream->queue))
-		return -EBUSY;
-
 	if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 		timeperframe = parm->parm.capture.timeperframe;
 	else
 		timeperframe = parm->parm.output.timeperframe;
 
-	memcpy(&probe, &stream->ctrl, sizeof probe);
 	interval = uvc_fraction_to_interval(timeperframe.numerator,
 		timeperframe.denominator);
-
 	uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n",
 		timeperframe.numerator, timeperframe.denominator, interval);
-	probe.dwFrameInterval = uvc_try_frame_interval(frame, interval);
+
+	mutex_lock(&stream->mutex);
+
+	if (uvc_queue_streaming(&stream->queue)) {
+		mutex_unlock(&stream->mutex);
+		return -EBUSY;
+	}
+
+	memcpy(&probe, &stream->ctrl, sizeof probe);
+	probe.dwFrameInterval =
+		uvc_try_frame_interval(stream->cur_frame, interval);
 
 	/* Probe the device with the new settings. */
 	ret = uvc_probe_video(stream, &probe);
-	if (ret < 0)
+	if (ret < 0) {
+		mutex_unlock(&stream->mutex);
 		return ret;
+	}
 
 	memcpy(&stream->ctrl, &probe, sizeof probe);
+	mutex_unlock(&stream->mutex);
 
 	/* Return the actual frame period. */
 	timeperframe.numerator = probe.dwFrameInterval;
@@ -528,11 +521,9 @@ static int uvc_v4l2_release(struct file *file)
 	if (uvc_has_privileges(handle)) {
 		uvc_video_enable(stream, 0);
 
-		mutex_lock(&stream->queue.mutex);
 		if (uvc_free_buffers(&stream->queue) < 0)
 			uvc_printk(KERN_ERR, "uvc_v4l2_release: Unable to "
 					"free buffers.\n");
-		mutex_unlock(&stream->queue.mutex);
 	}
 
 	/* Release the file handle. */
@@ -624,7 +615,7 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
 	}
 
 	case VIDIOC_QUERYMENU:
-		return uvc_v4l2_query_menu(chain, arg);
+		return uvc_query_v4l2_menu(chain, arg);
 
 	case VIDIOC_G_EXT_CTRLS:
 	{
@@ -905,15 +896,17 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
 	case VIDIOC_CROPCAP:
 	{
 		struct v4l2_cropcap *ccap = arg;
-		struct uvc_frame *frame = stream->cur_frame;
 
 		if (ccap->type != stream->type)
 			return -EINVAL;
 
 		ccap->bounds.left = 0;
 		ccap->bounds.top = 0;
-		ccap->bounds.width = frame->wWidth;
-		ccap->bounds.height = frame->wHeight;
+
+		mutex_lock(&stream->mutex);
+		ccap->bounds.width = stream->cur_frame->wWidth;
+		ccap->bounds.height = stream->cur_frame->wHeight;
+		mutex_unlock(&stream->mutex);
 
 		ccap->defrect = ccap->bounds;
 
@@ -930,8 +923,6 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
 	case VIDIOC_REQBUFS:
 	{
 		struct v4l2_requestbuffers *rb = arg;
-		unsigned int bufsize =
-			stream->ctrl.dwMaxVideoFrameSize;
 
 		if (rb->type != stream->type ||
 		    rb->memory != V4L2_MEMORY_MMAP)
@@ -940,7 +931,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
 		if ((ret = uvc_acquire_privileges(handle)) < 0)
 			return ret;
 
-		ret = uvc_alloc_buffers(&stream->queue, rb->count, bufsize);
+		mutex_lock(&stream->mutex);
+		ret = uvc_alloc_buffers(&stream->queue, rb->count,
+					stream->ctrl.dwMaxVideoFrameSize);
+		mutex_unlock(&stream->mutex);
 		if (ret < 0)
 			return ret;
 
@@ -988,7 +982,9 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
 		if (!uvc_has_privileges(handle))
 			return -EBUSY;
 
+		mutex_lock(&stream->mutex);
 		ret = uvc_video_enable(stream, 1);
+		mutex_unlock(&stream->mutex);
 		if (ret < 0)
 			return ret;
 		break;
@@ -1068,79 +1064,14 @@ static ssize_t uvc_v4l2_read(struct file *file, char __user *data,
 	return -EINVAL;
 }
 
-/*
- * VMA operations.
- */
-static void uvc_vm_open(struct vm_area_struct *vma)
-{
-	struct uvc_buffer *buffer = vma->vm_private_data;
-	buffer->vma_use_count++;
-}
-
-static void uvc_vm_close(struct vm_area_struct *vma)
-{
-	struct uvc_buffer *buffer = vma->vm_private_data;
-	buffer->vma_use_count--;
-}
-
-static const struct vm_operations_struct uvc_vm_ops = {
-	.open		= uvc_vm_open,
-	.close		= uvc_vm_close,
-};
-
 static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
 {
 	struct uvc_fh *handle = file->private_data;
 	struct uvc_streaming *stream = handle->stream;
-	struct uvc_video_queue *queue = &stream->queue;
-	struct uvc_buffer *uninitialized_var(buffer);
-	struct page *page;
-	unsigned long addr, start, size;
-	unsigned int i;
-	int ret = 0;
 
 	uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n");
 
-	start = vma->vm_start;
-	size = vma->vm_end - vma->vm_start;
-
-	mutex_lock(&queue->mutex);
-
-	for (i = 0; i < queue->count; ++i) {
-		buffer = &queue->buffer[i];
-		if ((buffer->buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
-			break;
-	}
-
-	if (i == queue->count || size != queue->buf_size) {
-		ret = -EINVAL;
-		goto done;
-	}
-
-	/*
-	 * VM_IO marks the area as being an mmaped region for I/O to a
-	 * device. It also prevents the region from being core dumped.
-	 */
-	vma->vm_flags |= VM_IO;
-
-	addr = (unsigned long)queue->mem + buffer->buf.m.offset;
-	while (size > 0) {
-		page = vmalloc_to_page((void *)addr);
-		if ((ret = vm_insert_page(vma, start, page)) < 0)
-			goto done;
-
-		start += PAGE_SIZE;
-		addr += PAGE_SIZE;
-		size -= PAGE_SIZE;
-	}
-
-	vma->vm_ops = &uvc_vm_ops;
-	vma->vm_private_data = buffer;
-	uvc_vm_open(vma);
-
-done:
-	mutex_unlock(&queue->mutex);
-	return ret;
+	return uvc_queue_mmap(&stream->queue, vma);
 }
 
 static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait)
@@ -1157,7 +1088,7 @@ const struct v4l2_file_operations uvc_fops = {
 	.owner		= THIS_MODULE,
 	.open		= uvc_v4l2_open,
 	.release	= uvc_v4l2_release,
-	.ioctl		= uvc_v4l2_ioctl,
+	.unlocked_ioctl	= uvc_v4l2_ioctl,
 	.read		= uvc_v4l2_read,
 	.mmap		= uvc_v4l2_mmap,
 	.poll		= uvc_v4l2_poll,
diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c
index 5555f0102838..5673d673504b 100644
--- a/drivers/media/video/uvc/uvc_video.c
+++ b/drivers/media/video/uvc/uvc_video.c
@@ -293,8 +293,6 @@ int uvc_probe_video(struct uvc_streaming *stream,
 	unsigned int i;
 	int ret;
 
-	mutex_lock(&stream->mutex);
-
 	/* Perform probing. The device should adjust the requested values
 	 * according to its capabilities. However, some devices, namely the
 	 * first generation UVC Logitech webcams, don't implement the Video
@@ -346,7 +344,6 @@ int uvc_probe_video(struct uvc_streaming *stream,
 	}
 
 done:
-	mutex_unlock(&stream->mutex);
 	return ret;
 }
 
diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h
index d97cf6d6a4f9..45f01e7e13d2 100644
--- a/drivers/media/video/uvc/uvcvideo.h
+++ b/drivers/media/video/uvc/uvcvideo.h
@@ -436,7 +436,9 @@ struct uvc_streaming {
 	struct uvc_streaming_control ctrl;
 	struct uvc_format *cur_format;
 	struct uvc_frame *cur_frame;
-
+	/* Protect access to ctrl, cur_format, cur_frame and hardware video
+	 * probe control.
+	 */
 	struct mutex mutex;
 
 	unsigned int frozen : 1;
@@ -574,6 +576,8 @@ extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable);
 extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
 extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
 		struct uvc_buffer *buf);
+extern int uvc_queue_mmap(struct uvc_video_queue *queue,
+		struct vm_area_struct *vma);
 extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
 		struct file *file, poll_table *wait);
 extern int uvc_queue_allocated(struct uvc_video_queue *queue);
@@ -606,10 +610,10 @@ extern int uvc_status_suspend(struct uvc_device *dev);
 extern int uvc_status_resume(struct uvc_device *dev);
 
 /* Controls */
-extern struct uvc_control *uvc_find_control(struct uvc_video_chain *chain,
-		__u32 v4l2_id, struct uvc_control_mapping **mapping);
 extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
 		struct v4l2_queryctrl *v4l2_ctrl);
+extern int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
+		struct v4l2_querymenu *query_menu);
 
 extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
 		const struct uvc_control_mapping *mapping);
diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c
index 03f7f4670e9b..359e23290a7e 100644
--- a/drivers/media/video/v4l2-dev.c
+++ b/drivers/media/video/v4l2-dev.c
@@ -186,12 +186,12 @@ static ssize_t v4l2_read(struct file *filp, char __user *buf,
 		size_t sz, loff_t *off)
 {
 	struct video_device *vdev = video_devdata(filp);
-	int ret = -EIO;
+	int ret = -ENODEV;
 
 	if (!vdev->fops->read)
 		return -EINVAL;
-	if (vdev->lock)
-		mutex_lock(vdev->lock);
+	if (vdev->lock && mutex_lock_interruptible(vdev->lock))
+		return -ERESTARTSYS;
 	if (video_is_registered(vdev))
 		ret = vdev->fops->read(filp, buf, sz, off);
 	if (vdev->lock)
@@ -203,12 +203,12 @@ static ssize_t v4l2_write(struct file *filp, const char __user *buf,
 		size_t sz, loff_t *off)
 {
 	struct video_device *vdev = video_devdata(filp);
-	int ret = -EIO;
+	int ret = -ENODEV;
 
 	if (!vdev->fops->write)
 		return -EINVAL;
-	if (vdev->lock)
-		mutex_lock(vdev->lock);
+	if (vdev->lock && mutex_lock_interruptible(vdev->lock))
+		return -ERESTARTSYS;
 	if (video_is_registered(vdev))
 		ret = vdev->fops->write(filp, buf, sz, off);
 	if (vdev->lock)
@@ -219,10 +219,10 @@ static ssize_t v4l2_write(struct file *filp, const char __user *buf,
 static unsigned int v4l2_poll(struct file *filp, struct poll_table_struct *poll)
 {
 	struct video_device *vdev = video_devdata(filp);
-	int ret = DEFAULT_POLLMASK;
+	int ret = POLLERR | POLLHUP;
 
 	if (!vdev->fops->poll)
-		return ret;
+		return DEFAULT_POLLMASK;
 	if (vdev->lock)
 		mutex_lock(vdev->lock);
 	if (video_is_registered(vdev))
@@ -238,20 +238,45 @@ static long v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 	int ret = -ENODEV;
 
 	if (vdev->fops->unlocked_ioctl) {
-		if (vdev->lock)
-			mutex_lock(vdev->lock);
+		if (vdev->lock && mutex_lock_interruptible(vdev->lock))
+			return -ERESTARTSYS;
 		if (video_is_registered(vdev))
 			ret = vdev->fops->unlocked_ioctl(filp, cmd, arg);
 		if (vdev->lock)
 			mutex_unlock(vdev->lock);
 	} else if (vdev->fops->ioctl) {
-		/* TODO: convert all drivers to unlocked_ioctl */
+		/* This code path is a replacement for the BKL. It is a major
+		 * hack but it will have to do for those drivers that are not
+		 * yet converted to use unlocked_ioctl.
+		 *
+		 * There are two options: if the driver implements struct
+		 * v4l2_device, then the lock defined there is used to
+		 * serialize the ioctls. Otherwise the v4l2 core lock defined
+		 * below is used. This lock is really bad since it serializes
+		 * completely independent devices.
+		 *
+		 * Both variants suffer from the same problem: if the driver
+		 * sleeps, then it blocks all ioctls since the lock is still
+		 * held. This is very common for VIDIOC_DQBUF since that
+		 * normally waits for a frame to arrive. As a result any other
+		 * ioctl calls will proceed very, very slowly since each call
+		 * will have to wait for the VIDIOC_QBUF to finish. Things that
+		 * should take 0.01s may now take 10-20 seconds.
+		 *
+		 * The workaround is to *not* take the lock for VIDIOC_DQBUF.
+		 * This actually works OK for videobuf-based drivers, since
+		 * videobuf will take its own internal lock.
+		 */
 		static DEFINE_MUTEX(v4l2_ioctl_mutex);
+		struct mutex *m = vdev->v4l2_dev ?
+			&vdev->v4l2_dev->ioctl_lock : &v4l2_ioctl_mutex;
 
-		mutex_lock(&v4l2_ioctl_mutex);
+		if (cmd != VIDIOC_DQBUF && mutex_lock_interruptible(m))
+			return -ERESTARTSYS;
 		if (video_is_registered(vdev))
 			ret = vdev->fops->ioctl(filp, cmd, arg);
-		mutex_unlock(&v4l2_ioctl_mutex);
+		if (cmd != VIDIOC_DQBUF)
+			mutex_unlock(m);
 	} else
 		ret = -ENOTTY;
 
@@ -265,8 +290,8 @@ static int v4l2_mmap(struct file *filp, struct vm_area_struct *vm)
 
 	if (!vdev->fops->mmap)
 		return ret;
-	if (vdev->lock)
-		mutex_lock(vdev->lock);
+	if (vdev->lock && mutex_lock_interruptible(vdev->lock))
+		return -ERESTARTSYS;
 	if (video_is_registered(vdev))
 		ret = vdev->fops->mmap(filp, vm);
 	if (vdev->lock)
@@ -284,7 +309,7 @@ static int v4l2_open(struct inode *inode, struct file *filp)
 	mutex_lock(&videodev_lock);
 	vdev = video_devdata(filp);
 	/* return ENODEV if the video device has already been removed. */
-	if (vdev == NULL) {
+	if (vdev == NULL || !video_is_registered(vdev)) {
 		mutex_unlock(&videodev_lock);
 		return -ENODEV;
 	}
@@ -292,8 +317,10 @@ static int v4l2_open(struct inode *inode, struct file *filp)
 	video_get(vdev);
 	mutex_unlock(&videodev_lock);
 	if (vdev->fops->open) {
-		if (vdev->lock)
-			mutex_lock(vdev->lock);
+		if (vdev->lock && mutex_lock_interruptible(vdev->lock)) {
+			ret = -ERESTARTSYS;
+			goto err;
+		}
 		if (video_is_registered(vdev))
 			ret = vdev->fops->open(filp);
 		else
@@ -302,6 +329,7 @@ static int v4l2_open(struct inode *inode, struct file *filp)
 			mutex_unlock(vdev->lock);
 	}
 
+err:
 	/* decrease the refcount in case of an error */
 	if (ret)
 		video_put(vdev);
@@ -596,7 +624,12 @@ void video_unregister_device(struct video_device *vdev)
 	if (!vdev || !video_is_registered(vdev))
 		return;
 
+	mutex_lock(&videodev_lock);
+	/* This must be in a critical section to prevent a race with v4l2_open.
+	 * Once this bit has been cleared video_get may never be called again.
+	 */
 	clear_bit(V4L2_FL_REGISTERED, &vdev->flags);
+	mutex_unlock(&videodev_lock);
 	device_unregister(&vdev->dev);
 }
 EXPORT_SYMBOL(video_unregister_device);
diff --git a/drivers/media/video/v4l2-device.c b/drivers/media/video/v4l2-device.c
index 0b08f96b74a5..7fe6f92af480 100644
--- a/drivers/media/video/v4l2-device.c
+++ b/drivers/media/video/v4l2-device.c
@@ -35,6 +35,7 @@ int v4l2_device_register(struct device *dev, struct v4l2_device *v4l2_dev)
 
 	INIT_LIST_HEAD(&v4l2_dev->subdevs);
 	spin_lock_init(&v4l2_dev->lock);
+	mutex_init(&v4l2_dev->ioctl_lock);
 	v4l2_dev->dev = dev;
 	if (dev == NULL) {
 		/* If dev == NULL, then name must be filled in by the caller */
diff --git a/drivers/media/video/w9966.c b/drivers/media/video/w9966.c
index 635420d8d84a..019ee206cbee 100644
--- a/drivers/media/video/w9966.c
+++ b/drivers/media/video/w9966.c
@@ -815,7 +815,7 @@ out:
 
 static const struct v4l2_file_operations w9966_fops = {
 	.owner		= THIS_MODULE,
-	.ioctl          = video_ioctl2,
+	.unlocked_ioctl = video_ioctl2,
 	.read           = w9966_v4l_read,
 };