1 files changed, 22 insertions, 20 deletions

diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c
index 5dced5b79387..8aa5687f392a 100644
--- a/sound/pci/intel8x0.c
+++ b/sound/pci/intel8x0.c
@@ -356,8 +356,6 @@ struct ichdev {
         unsigned int position;
 	unsigned int pos_shift;
 	unsigned int last_pos;
-	unsigned long last_pos_jiffies;
-	unsigned int jiffy_to_bytes;
         int frags;
         int lvi;
         int lvi_frag;
@@ -844,7 +842,6 @@ static int snd_intel8x0_pcm_trigger(struct snd_pcm_substream *substream, int cmd
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		val = ICH_IOCE | ICH_STARTBM;
 		ichdev->last_pos = ichdev->position;
-		ichdev->last_pos_jiffies = jiffies;
 		break;
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 		ichdev->suspended = 1;
@@ -1048,7 +1045,6 @@ static int snd_intel8x0_pcm_prepare(struct snd_pcm_substream *substream)
 			ichdev->pos_shift = (runtime->sample_bits > 16) ? 2 : 1;
 	}
 	snd_intel8x0_setup_periods(chip, ichdev);
-	ichdev->jiffy_to_bytes = (runtime->rate * 4 * ichdev->pos_shift) / HZ;
 	return 0;
 }
 
@@ -1073,19 +1069,23 @@ static snd_pcm_uframes_t snd_intel8x0_pcm_pointer(struct snd_pcm_substream *subs
 		    ptr1 == igetword(chip, ichdev->reg_offset + ichdev->roff_picb))
 			break;
 	} while (timeout--);
+	ptr = ichdev->last_pos;
 	if (ptr1 != 0) {
 		ptr1 <<= ichdev->pos_shift;
 		ptr = ichdev->fragsize1 - ptr1;
 		ptr += position;
-		ichdev->last_pos = ptr;
-		ichdev->last_pos_jiffies = jiffies;
-	} else {
-		ptr1 = jiffies - ichdev->last_pos_jiffies;
-		if (ptr1)
-			ptr1 -= 1;
-		ptr = ichdev->last_pos + ptr1 * ichdev->jiffy_to_bytes;
-		ptr %= ichdev->size;
+		if (ptr < ichdev->last_pos) {
+			unsigned int pos_base, last_base;
+			pos_base = position / ichdev->fragsize1;
+			last_base = ichdev->last_pos / ichdev->fragsize1;
+			/* another sanity check; ptr1 can go back to full
+			 * before the base position is updated
+			 */
+			if (pos_base == last_base)
+				ptr = ichdev->last_pos;
+		}
 	}
+	ichdev->last_pos = ptr;
 	spin_unlock(&chip->reg_lock);
 	if (ptr >= ichdev->size)
 		return 0;
@@ -1854,6 +1854,12 @@ static struct ac97_quirk ac97_quirks[] __devinitdata = {
 	},
 	{
 		.subvendor = 0x1028,
+		.subdevice = 0x016a,
+		.name = "Dell Inspiron 8600",	/* STAC9750/51 */
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.subvendor = 0x1028,
 		.subdevice = 0x0186,
 		.name = "Dell Latitude D810", /* cf. Malone #41015 */
 		.type = AC97_TUNE_HP_MUTE_LED
@@ -1896,12 +1902,6 @@ static struct ac97_quirk ac97_quirks[] __devinitdata = {
 	},
 	{
 		.subvendor = 0x103c,
-		.subdevice = 0x0934,
-		.name = "HP nx8220",
-		.type = AC97_TUNE_MUTE_LED
-	},
-	{
-		.subvendor = 0x103c,
 		.subdevice = 0x129d,
 		.name = "HP xw8000",
 		.type = AC97_TUNE_HP_ONLY
@@ -2751,11 +2751,12 @@ static void __devinit intel8x0_measure_ac97_clock(struct intel8x0 *chip)
 	if (pos == 0) {
 		snd_printk(KERN_ERR "intel8x0: measure - unreliable DMA position..\n");
 	      __retry:
-		if (attempt < 2) {
+		if (attempt < 3) {
+			msleep(300);
 			attempt++;
 			goto __again;
 		}
-		return;
+		goto __end;
 	}
 
 	pos /= 4;
@@ -2782,6 +2783,7 @@ static void __devinit intel8x0_measure_ac97_clock(struct intel8x0 *chip)
 	else if (pos < 47500 || pos > 48500)
 		/* not 48000Hz, tuning the clock.. */
 		chip->ac97_bus->clock = (chip->ac97_bus->clock * 48000) / pos;
+      __end:
 	printk(KERN_INFO "intel8x0: clocking to %d\n", chip->ac97_bus->clock);
 	snd_ac97_update_power(chip->ac97[0], AC97_PCM_FRONT_DAC_RATE, 0);
 }