Hi Takashi, thanks for your quick reply.
Which kernel are you using? Some races in aloop driver have been fixed in 3.7 kernel.
I tried different kernel versions, including: + official debian kernel (3.2.0-4) + liquorix debian kernel (3.7.0-4) + upstream kernel from kernel.org (git repository, 3.8.0-rc6 at the moment)
The bug is present in every version.
If the problem is still seen on 3.6 kernel, try the patch below. Let me know if it fixes the problem.
I applied this patch to the upstream kernel, and it fixes the problem. Thanks a lot !
Regards, Arnaud.
2013/2/1 Takashi Iwai tiwai@suse.de:
At Fri, 01 Feb 2013 15:48:53 +0100, Takashi Iwai wrote:
At Thu, 31 Jan 2013 21:09:13 +0100, El boulangero wrote:
Hi,
I use the loopback device all the time. It works pretty good, except when I suspend my computer to RAM. On resume, I've got a kernel call trace.
Which kernel are you using? Some races in aloop driver have been fixed in 3.7 kernel.
If the problem is still seen on 3.6 kernel, try the patch below. Let me know if it fixes the problem.
Takashi
diff --git a/sound/drivers/aloop.c b/sound/drivers/aloop.c index 3d82232..64d5347 100644 --- a/sound/drivers/aloop.c +++ b/sound/drivers/aloop.c @@ -286,12 +286,14 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd) loopback_active_notify(dpcm); break; case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_SUSPEND: spin_lock(&cable->lock); cable->pause |= stream; loopback_timer_stop(dpcm); spin_unlock(&cable->lock); break; case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:case SNDRV_PCM_TRIGGER_RESUME: spin_lock(&cable->lock); dpcm->last_jiffies = jiffies; cable->pause &= ~stream;@@ -563,7 +565,8 @@ static snd_pcm_uframes_t loopback_pointer(struct snd_pcm_substream *substream) static struct snd_pcm_hardware loopback_pcm_hardware = { .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE),
SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE |SNDRV_PCM_INFO_RESUME), .formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE | SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE),