From: Jaroslav Kysela <perex@perex.cz>
Date: Fri, 10 Apr 2009 10:20:45 +0000 (+0200)
Subject: [ALSA] hda_intel: fix unexpected ring buffer positions
X-Git-Tag: v2.6.30-rc3~86^2~5^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fa00e046b41663cbda9b1affc0594669e5f14219;p=pandora-kernel.git

[ALSA] hda_intel: fix unexpected ring buffer positions

I found two issues with ICH7-M (it should be related to other HDA chipsets
as well):

- the ring buffer position is not reset when stream restarts (after xrun) -
  solved by moving azx_stream_reset() call from open() to prepare() callback
  and reset posbuf to zero (it might be filled with hw later than position()
  callback is called)
- irq_ignore flag should be set also when ring buffer memory area is not
  changed in prepare() callback - this patch replaces irq_ignore with
  more universal check based on jiffies clock

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
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