ALSA: usb-audio: Fix invalid UAC2/3 mixer unit matrix evaluation

The bitmap matrix in the mixer unit descriptor for UAC2 and UAC3 has
rather the size of input-pins x output-pins, while the current
USB-audio driver code wrongly assumes the UAC1 bitmap matrix size,
which is input-channels x output-pins.  That is, when input pins have
multiple channels, the column size differs and it leads to the
accesses at a wrong position.

This patch corrects the access of the bitmap matrix for UAC2/UAC3.
For making the code cleaner, split the parser to UAC1 and UAC2/3, too.

Reported-by: Sashiko <sashiko-bot@kernel.org>
Fixes: 23caaf19b11e ("ALSA: usb-mixer: Add support for Audio Class v2.0")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20261007172051.13240-5-tiwai@suse.de

0 files changed, 0 insertions, 0 deletions