[alsa-devel] [PATCH] sound/usb/card.c: clear chip->probing on error exit
tiwai at suse.de
Fri Sep 23 15:28:02 CEST 2011
At Thu, 22 Sep 2011 18:26:06 +0200 (CEST),
Thomas Pfaff wrote:
> 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: Thomas Pfaff <tpfaff at gmx.net>
Applied now. Thanks.
> diff -urp a/sound/usb/card.c b/sound/usb/card.c
> --- a/sound/usb/card.c 2011-09-22 08:42:29.138247328 +0200
> +++ b/sound/usb/card.c 2011-09-22 09:02:09.382079980 +0200
> @@ -532,6 +532,7 @@ snd_usb_audio_probe(struct usb_device *d
> if (chip && !chip->num_interfaces)
> + chip->probing = 0;
> return NULL;
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