| Date | Wed, 28 Sep 2011 15:02:51 -0700 | From | Greg KH <> | Subject | [207/244] ALSA: usb-audio - clear chip->probing on error exit |
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3.0-stable review patch. If anyone has any objections, please let us know.
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From: Thomas Pfaff <tpfaff@gmx.net>
commit 362e4e49abe53e89d87455dfcd7c1bbaf08a839d upstream.
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> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- sound/usb/card.c | 1 + 1 file changed, 1 insertion(+)
--- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -531,6 +531,7 @@ static void *snd_usb_audio_probe(struct __error: if (chip && !chip->num_interfaces) snd_card_free(chip->card); + chip->probing = 0; mutex_unlock(®ister_mutex); __err_val: return NULL;
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