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23 October 2021, 00:29:24 UTC
Revision 342cda29343a6272c630f94ed56810a76740251b authored by Clemens Ladisch on 15 June 2013, 09:21:09 UTC, committed by Takashi Iwai on 17 June 2013, 07:56:52 UTC 
ALSA: usb-audio: work around Android accessory firmware bug
 
When the Android firmware enables the audio interfaces in accessory
mode, it always declares in the control interface's baInterfaceNr array
that interfaces 0 and 1 belong to the audio function.  However, the
accessory interface itself, if also enabled, already is at index 0 and
shifts the actual audio interface numbers to 1 and 2, which prevents the
PCM streaming interface from being seen by the host driver.

To get the PCM interface interface to work, detect when the descriptors
point to the (for this driver useless) accessory interface, and redirect
to the correct one.

Reported-by: Jeremy Rosen <jeremy.rosen@openwide.fr>
Tested-by: Jeremy Rosen <jeremy.rosen@openwide.fr>
Cc: <stable@vger.kernel.org>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
1 parent d81bf8c
History
Tip revision: 342cda29343a6272c630f94ed56810a76740251b authored by Clemens Ladisch on 15 June 2013, 09:21:09 UTC
ALSA: usb-audio: work around Android accessory firmware bug
Tip revision: 342cda2
File Mode Size
apparmor
integrity
keys
selinux
smack
tomoyo
yama
Kconfig -rw-r--r-- 5.7 KB
Makefile -rw-r--r-- 1.0 KB
capability.c -rw-r--r-- 23.9 KB
commoncap.c -rw-r--r-- 28.1 KB
device_cgroup.c -rw-r--r-- 18.9 KB
inode.c -rw-r--r-- 6.7 KB
lsm_audit.c -rw-r--r-- 9.3 KB
min_addr.c -rw-r--r-- 1.3 KB
security.c -rw-r--r-- 35.2 KB
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