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13 June 2022, 11:31:42 UTC
Revision 362e4e49abe53e89d87455dfcd7c1bbaf08a839d authored by Thomas Pfaff on 22 September 2011, 16:26:06 UTC, committed by Takashi Iwai on 23 September 2011, 13:26:06 UTC 
ALSA: usb-audio - clear chip->probing on error exit
 
The Terratec Aureon 5.1 USB sound card support is broken since kernel
2.6.39.
2.6.39 introduced power management support for USB sound cards that added
a probing flag in struct snd_usb_audio.

During the probe of the card it gives following error message :

usb 7-2: new full speed USB device number 2 using uhci_hcd
cannot find UAC_HEADER
snd-usb-audio: probe of 7-2:1.3 failed with error -5
input: USB Audio as
/devices/pci0000:00/0000:00:1d.1/usb7/7-2/7-2:1.3/input/input6
generic-usb 0003:0CCD:0028.0001: input: USB HID v1.00 Device [USB Audio]
on usb-0000:00:1d.1-2/input3

I can not comment about that "cannot find UAC_HEADER" error, but until
2.6.38 the card worked anyway.
With 2.6.39 chip->probing remains 1 on error exit, and any later ioctl
stops in snd_usb_autoresume with -ENODEV.

Signed-off-by: Thomas Pfaff <tpfaff@gmx.net>
Cc: <stable@kernel.org> [2.6.39+]
Signed-off-by: Takashi Iwai <tiwai@suse.de>
1 parent c37279b
History
Tip revision: 362e4e49abe53e89d87455dfcd7c1bbaf08a839d authored by Thomas Pfaff on 22 September 2011, 16:26:06 UTC
ALSA: usb-audio - clear chip->probing on error exit
Tip revision: 362e4e4
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