On Mon, 25 Jul 2005, Marcelo Tosatti wrote:
> Hi folks,
>
> I'm using RH's 2.6.11-1.14_FC3 on my laptop and encountered this issue
> after removing/adding snd modules.
>
> snd_ac97_update_bits tries to grab a semaphore while
> snd_pcm_action_single is holding a couple of spinlocks. It seems that
> the erratic callpath is also possible with v2.6 mainline.
>
> Debug: sleeping function called from invalid context at
> include/asm/semaphore.h:107
> in_atomic():0, irqs_disabled():1
> [<c011cfbe>] __might_sleep+0x9c/0xa4
> [<e09e02d3>] snd_ac97_update_bits+0x31/0x61 [snd_ac97_codec]
> [<e094aa7b>] snd_intel8x0m_pcm_trigger+0x5b/0x74 [snd_intel8x0m]
This snd_ac97_update_bits() call was removed from the trigger callback in
our recent code. This setup is available using a control element from user
space now.
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SUSE Labs
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