At Mon, 7 Nov 2011 20:33:25 +0400, Denis V. Lunev wrote:
The recently merged 228cf79376f1 looks a bit hackish while it is not. The change was quite simple. In a virtualized environment the patch unhacks old kludge introduced for old broken AC97 hardware.
This patch adds proper comment to "unkludge" code.
Signed-off-by: Denis V. Lunev den@openvz.org Signed-off-by: Konstantin Ozerkov kozerkov@parallels.com
Applied now. Thanks.
Takashi
sound/pci/intel8x0.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c index 29e3125..c3b9bd0 100644 --- a/sound/pci/intel8x0.c +++ b/sound/pci/intel8x0.c @@ -1077,6 +1077,13 @@ static snd_pcm_uframes_t snd_intel8x0_pcm_pointer(struct snd_pcm_substream *subs } if (civ != igetbyte(chip, ichdev->reg_offset + ICH_REG_OFF_CIV)) continue;
/* IO read operation is very expensive inside virtual machine* as it is emulated. The probability that subsequent PICB read* will return different result is high enough to loop till* timeout here.* Same CIV is strict enough condition to be sure that PICB* is valid inside VM on emulated card. */-- 1.7.4.4