ALSA: usb-audio: Fix UAC2 get_ctl request with a RANGE attribute

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The layout of the UAC2 Control request and response varies depending on
the request type. With the current implementation, only the Layout 2
Parameter Block (with the 2-byte sized RANGE attribute) is handled
properly. For the Control requests with the 1-byte sized RANGE attribute
(Bass Control, Mid Control, Tremble Control), the response is parsed
incorrectly.

This commit:
* fixes the wLength field value in the request
* fixes parsing the range values from the response

Fixes: 23caaf19b1 ("ALSA: usb-mixer: Add support for Audio Class v2.0")
Signed-off-by: Kirill Marinushkin <k.marinushkin@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

...

This commit is contained in:

Kirill Marinushkin 2018-01-29 06:37:55 +01:00 • committed by Takashi Iwai

parent 2bda7141b8

commit 447cae58ce

1 changed files with 11 additions and 7 deletions

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sound/usb/mixer.c

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