Commit 362e4e49 authored by Thomas Pfaff's avatar Thomas Pfaff Committed by Takashi Iwai

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 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
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: default avatarThomas Pfaff <>
Cc: <> [2.6.39+]
Signed-off-by: default avatarTakashi Iwai <>
parent c37279b9
......@@ -532,6 +532,7 @@ snd_usb_audio_probe(struct usb_device *dev,
if (chip && !chip->num_interfaces)
chip->probing = 0;
return NULL;
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