diff options
| -rw-r--r-- | drivers/media/video/davinci/vpbe_display.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/media/video/davinci/vpbe_display.c b/drivers/media/video/davinci/vpbe_display.c index 6fe7034bea7c..9a05c817462c 100644 --- a/drivers/media/video/davinci/vpbe_display.c +++ b/drivers/media/video/davinci/vpbe_display.c @@ -1376,10 +1376,15 @@ static int vpbe_display_mmap(struct file *filep, struct vm_area_struct *vma) struct vpbe_fh *fh = filep->private_data; struct vpbe_layer *layer = fh->layer; struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev; + int ret; v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_mmap\n"); - return videobuf_mmap_mapper(&layer->buffer_queue, vma); + if (mutex_lock_interruptible(&layer->opslock)) + return -ERESTARTSYS; + ret = videobuf_mmap_mapper(&layer->buffer_queue, vma); + mutex_unlock(&layer->opslock); + return ret; } /* vpbe_display_poll(): It is used for select/poll system call @@ -1392,8 +1397,11 @@ static unsigned int vpbe_display_poll(struct file *filep, poll_table *wait) unsigned int err = 0; v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_poll\n"); - if (layer->started) + if (layer->started) { + mutex_lock(&layer->opslock); err = videobuf_poll_stream(filep, &layer->buffer_queue, wait); + mutex_unlock(&layer->opslock); + } return err; } @@ -1428,10 +1436,12 @@ static int vpbe_display_open(struct file *file) fh->disp_dev = disp_dev; if (!layer->usrs) { - + if (mutex_lock_interruptible(&layer->opslock)) + return -ERESTARTSYS; /* First claim the layer for this device */ err = osd_device->ops.request_layer(osd_device, layer->layer_info.id); + mutex_unlock(&layer->opslock); if (err < 0) { /* Couldn't get layer */ v4l2_err(&vpbe_dev->v4l2_dev, @@ -1469,6 +1479,7 @@ static int vpbe_display_release(struct file *file) v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_release\n"); + mutex_lock(&layer->opslock); /* if this instance is doing IO */ if (fh->io_allowed) { /* Reset io_usrs member of layer object */ @@ -1503,6 +1514,7 @@ static int vpbe_display_release(struct file *file) /* Close the priority */ v4l2_prio_close(&layer->prio, fh->prio); file->private_data = NULL; + mutex_unlock(&layer->opslock); /* Free memory allocated to file handle object */ kfree(fh); @@ -1620,10 +1632,6 @@ static __devinit int init_vpbe_layer(int i, struct vpbe_display *disp_dev, vbd->ioctl_ops = &vpbe_ioctl_ops; vbd->minor = -1; vbd->v4l2_dev = &disp_dev->vpbe_dev->v4l2_dev; - /* Locking in file operations other than ioctl should be done - by the driver, not the V4L2 core. - This driver needs auditing so that this flag can be removed. */ - set_bit(V4L2_FL_LOCK_ALL_FOPS, &vbd->flags); vbd->lock = &vpbe_display_layer->opslock; if (disp_dev->vpbe_dev->current_timings.timings_type & |