[alsa-devel] usbaudio: Support for USB audio v2.0 devices

[The Source]

08.05.2010 00:12, Daniel Mack пишет:
> On Fri, May 07, 2010 at 05:19:24PM +0400, The Source wrote:
>    
>> Bisect results:
>>
>> 23caaf19b11eda7054348452e1618d4512a86907 is the first bad commit
>> commit 23caaf19b11eda7054348452e1618d4512a86907
>> Author: Daniel Mack<daniel at caiaq.de>
>> Date:   Thu Mar 11 21:13:25 2010 +0100
>>
>>      ALSA: usb-mixer: Add support for Audio Class v2.0
>>
>>      USB Audio Class v2.0 compliant devices have different descriptors and a
>>      different way of setting/getting min/max/res/cur properties. This patch
>>      adds support for them.
>>
>>      Signed-off-by: Daniel Mack<daniel at caiaq.de>
>>      Cc: Clemens Ladisch<clemens at ladisch.de>
>>      Signed-off-by: Takashi Iwai<tiwai at suse.de>
>>
>>      
> I've found two changes in this commit that are obviously wrong.
> Could you try the patch below please?
>
> Sorry for the trouble.
>
> Daniel
>
>
> diff --git a/include/linux/usb/audio.h b/include/linux/usb/audio.h
> index 905a87c..57f2055 100644
> --- a/include/linux/usb/audio.h
> +++ b/include/linux/usb/audio.h
> @@ -244,7 +244,7 @@ struct uac_selector_unit_descriptor {
>   static inline __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc)
>   {
>   	__u8 *raw = (__u8 *) desc;
> -	return raw[desc->bLength - 1];
> +	return raw[9 + desc->bLength - 1];
>   }
>
>   /* 4.3.2.5 Feature Unit Descriptor */
> diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
> index 21613fe..fa0fb77 100644
> --- a/sound/usb/mixer.c
> +++ b/sound/usb/mixer.c
> @@ -656,7 +656,7 @@ static int check_input_term(struct mixer_build *state, int id, struct usb_audio_
>   		case UAC_FEATURE_UNIT: {
>   			/* the header is the same for v1 and v2 */
>   			struct uac_feature_unit_descriptor *d = p1;
> -			id = d->bUnitID;
> +			id = d->bSourceID;
>   			break; /* continue to parse */
>   		}
>   		case UAC_MIXER_UNIT: {
>
>    
The patch did it (applied to latest git, or so I think - I used 'git 
bisect reset' to return to latest), now the card works properly (both 
playback and record), thank you very much.