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Takashi Iwai ca95c7bf3d ALSA: usb-audio: Fix parse of UAC2 Extension Units 
Extension Unit (XU) is used to have a compatible layout with
Processing Unit (PU) on UAC1, and the usb-audio driver code assumed it
for parsing the descriptors.  Meanwhile, on UAC2, XU became slightly
incompatible with PU; namely, XU has a one-byte bmControls bitmap
while PU has two bytes bmControls bitmap.  This incompatibility
results in the read of a wrong address for the last iExtension field,
which ended up with an incorrect string for the mixer element name, as
recently reported for Focusrite Scarlett 18i20 device.

This patch corrects this misalignment by introducing a couple of new
macros and calling them depending on the descriptor type.

Fixes: 23caaf19b1 ("ALSA: usb-mixer: Add support for Audio Class v2.0")
Reported-by: Stefan Sauer <ensonic@hora-obscura.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
 		2019-07-05 08:06:47 +02:00
..
6fire ALSA: pcm: Nuke snd_pcm_lib_mmap_vmalloc() 2018-07-18 08:24:29 +02:00
bcd2000 sound updates for 4.15-rc1 2017-11-14 18:01:46 -08:00
caiaq ALSA: caiaq: Add fall-through annotation 2018-10-12 09:31:26 +02:00
hiface ALSA: pcm: Nuke snd_pcm_lib_mmap_vmalloc() 2018-07-18 08:24:29 +02:00
line6 ALSA: line6: Use container_of() 2019-05-28 09:05:31 +02:00
misc ALSA: pcm: Nuke snd_pcm_lib_mmap_vmalloc() 2018-07-18 08:24:29 +02:00
usx2y ALSA: usx2y: fix a double free bug 2019-04-29 19:56:41 +02:00
Kconfig media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00
Makefile media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00
card.c media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00
card.h media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00
clock.c ALSA: usb-audio: Allow changing from a bad sample rate 2018-07-19 08:44:46 +02:00
clock.h ALSA: usb: initial USB Audio Device Class 3.0 support 2018-03-21 11:46:33 +01:00
debug.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
endpoint.c ALSA: usb-audio: remove redundant pointer 'urb' 2018-08-01 14:00:32 +02:00
endpoint.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
format.c ALSA: usb-audio: Expose sample resolution through proc interface 2019-02-18 09:36:09 +01:00
format.h ALSA: usb: initial USB Audio Device Class 3.0 support 2018-03-21 11:46:33 +01:00
helper.c ALSA: usb-audio: Sanity checks for each pipe and EP types 2019-06-24 15:11:06 +02:00
helper.h ALSA: usb-audio: Sanity checks for each pipe and EP types 2019-06-24 15:11:06 +02:00
media.c media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00
media.h media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00
midi.c ALSA: rawmidi: A lightweight function to discard pending bytes 2018-10-04 20:13:17 +02:00
midi.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mixer.c ALSA: usb-audio: Fix parse of UAC2 Extension Units 2019-07-05 08:06:47 +02:00
mixer.h media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00
mixer_maps.c ALSA: usb: add UAC3 BADD profiles support 2018-05-13 08:54:35 +02:00
mixer_quirks.c ALSA: usb-audio: fix sign unintended sign extension on left shifts 2019-06-28 10:37:34 +02:00
mixer_quirks.h ALSA: usb-audio: Initialize Dell Dock playback volumes 2018-05-02 16:02:32 +02:00
mixer_scarlett.c ALSA: usb-audio: Clean up mixer element list traverse 2018-05-03 12:35:19 +02:00
mixer_scarlett.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mixer_us16x08.c ALSA: usb: Avoid VLA in mixer_us16x08.c 2017-05-31 08:46:19 +02:00
mixer_us16x08.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pcm.c media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00
pcm.h ALSA: usb-audio: Add UAC3 Power Domains to suspend/resume 2018-07-31 15:01:36 +02:00
power.c ALSA: usb-audio: Initial Power Domain support 2018-07-31 15:01:22 +02:00
power.h ALSA: usb-audio: Initial Power Domain support 2018-07-31 15:01:22 +02:00
proc.c ALSA: usb-audio: Expose sample resolution through proc interface 2019-02-18 09:36:09 +01:00
proc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
quirks-table.h ALSA: usb-audio: Enable .product_name override for Emagic, Unitor 8. 2019-06-11 12:12:08 +02:00
quirks.c ALSA: usb-audio: Sanity checks for each pipe and EP types 2019-06-24 15:11:06 +02:00
quirks.h ALSA: usb-audio: move audioformat quirks to quirks.c 2018-03-19 17:00:12 +01:00
stream.c media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00
stream.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
usbaudio.h media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00