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] [<e09b2ccd>] snd_pcm_do_stop+0x35/0x39 [snd_pcm] [<e09b2571>] snd_pcm_action_single+0x1d/0x4c [snd_pcm] [<e09b26a4>] snd_pcm_action+0x104/0x19a [snd_pcm] [<c018c8a2>] do_select+0x33b/0x440 [<e09b3d88>] snd_pcm_drop+0xad/0x222 [snd_pcm] [<e09b5c5b>] snd_pcm_hwsync+0xfd/0x1b6 [snd_pcm] [<e09b64b2>] snd_pcm_playback_ioctl1+0x3a/0x413 [snd_pcm] [<e09b6b1f>] snd_pcm_playback_ioctl+0x0/0x26 [snd_pcm] [<c018bb99>] do_ioctl+0x39/0x52 [<c018bd47>] vfs_ioctl+0x57/0x195 [<c018bee4>] sys_ioctl+0x5f/0x6f [<c0103903>] syscall_call+0x7/0xb codec_semaphore: semaphore is not ready [0x1][0x700300] codec_write 1: semaphore is not ready for register 0x54 snd_intel8x0m 18565 1 snd_ac97_codec 71097 1 snd_intel8x0m snd_pcm 99657 3 snd_intel8x0m,snd_ac97_codec snd_timer 33093 1 snd_pcm snd 56741 5 snd_intel8x0m,snd_ac97_codec,snd_pcm,snd_timer soundcore 10785 1 snd snd_page_alloc 9669 2 snd_intel8x0m,snd_pcm - To unsubscribe from this list: send the line "unsubscribe linux-sound" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
