Re: [Alsa-user] snd-usb-audio Oopses

[Takashi I. <ti...@su...>]

At Thu, 29 Jan 2004 21:27:44 +0000,
Andy Green wrote:
> 
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> Hi folks -
> 
> Logitech USB Headset in use on Redhat Kernel 2.6.1 build (with its native 
> Alsa).  Seeing a lot of these errors in /var/log/messages, prompted by 
> seeking around in mplayer, or pausing.
> 
> Jan 29 16:03:32 fastcat kernel: Debug: sleeping function called from invalid 
> context at kernel/sched.c:1870
> Jan 29 16:03:32 fastcat kernel: in_atomic():0, irqs_disabled():1
> Jan 29 16:03:32 fastcat kernel: Call Trace:
> Jan 29 16:03:32 fastcat kernel:  [<c0125db0>] __might_sleep+0x90/0xb0
> Jan 29 16:03:32 fastcat kernel:  [<c0123f49>] wait_for_completion+0x19/0x2f0
> Jan 29 16:03:32 fastcat kernel:  [<c02adadd>] __kfree_skb+0x9d/0x140
> Jan 29 16:03:32 fastcat kernel:  [<f88e11ca>] hcd_unlink_urb+0x3fa/0x6f0 
> [usbcore]
> Jan 29 16:03:32 fastcat kernel:  [<c01e41f2>] avc_has_perm+0x62/0x78
> Jan 29 16:03:32 fastcat kernel:  [<f895af50>] snd_complete_urb+0x0/0xb0 
> [snd_usb_audio]
> Jan 29 16:03:32 fastcat kernel:  [<f88e2029>] usb_unlink_urb+0x29/0x30 
> [usbcore]
> Jan 29 16:03:32 fastcat kernel:  [<f895b157>] deactivate_urbs+0xa7/0xb0 
> [snd_usb_audio]
> Jan 29 16:03:32 fastcat kernel:  [<f895b37d>] snd_usb_pcm_trigger+0x3d/0x40 
> [snd_usb_audio]
> Jan 29 16:03:32 fastcat kernel:  [<f8940b38>] snd_pcm_do_stop+0x18/0x20 
> [snd_pcm]
> Jan 29 16:03:32 fastcat kernel:  [<f894040c>] snd_pcm_action_single+0x2c/0x50 
> [snd_pcm]
> Jan 29 16:03:32 fastcat kernel:  [<f89405aa>] snd_pcm_action+0x17a/0x190 
> [snd_pcm]
> Jan 29 16:03:32 fastcat kernel:  [<f8946def>] 
> snd_pcm_update_hw_ptr+0x10f/0x1c0 [snd_pcm]
> Jan 29 16:03:32 fastcat kernel:  [<f8942257>] 
> snd_pcm_playback_drop+0x1b7/0x3a0 [snd_pcm]
> Jan 29 16:03:32 fastcat kernel:  [<f8945196>] 
> snd_pcm_playback_ioctl1+0x76/0x580 [snd_pcm]
> Jan 29 16:03:32 fastcat kernel:  [<c0175a34>] vfs_read+0xe4/0x120
> Jan 29 16:03:32 fastcat kernel:  [<c018deaf>] sys_ioctl+0xcf/0x240
> Jan 29 16:03:32 fastcat kernel:  [<c0175c78>] sys_read+0x38/0x60
> Jan 29 16:03:32 fastcat kernel:  [<c010c49f>] syscall_call+0x7/0xb
> Jan 29 16:03:32 fastcat kernel:
> 
> Saw a similar problem reported in the archives
> 
> http://www.mail-archive.com/als...@li.../msg09901.html
> 
> I tried uncommenting the var and recompiling the kernel, but it didn't seem to 
> make much difference.
> 
> The ALSA version in the kernel is surprisingly old???
> 
> [root@fastcat mnt]# cat /proc/asound/version
> Advanced Linux Sound Architecture Driver Version 0.9.7 (Thu Sep 25 19:16:36 
> 2003 UTC).
> Compiled on Jan 22 2004 for kernel 2.6.1-1.57.
> 
> Is there any advice anyone can give about resolving this, perhaps how to go 
> about updating the alsa sources in the kernel tree?  

yes, it's a known bug in the old ALSA driver.
already fixed in the recent code.


Takashi