ALSA: usb-audio: Fix mixer bitmap cache over 32 channels

USB-audio driver keeps the bitmap for the cached mixer channels, but
since a 32bit integer is used, it's currently broken for over 32
channels.  As the driver is supposed to support up to 64 channels,
this patch extends the bitmap properly -- now to be more flexible, use
the standard bitmap instead of the manual bit shifts.

Some checks for master channels are replaced in a slightly different
manner (checking the channel index 0) instead of the full cval->cached
check, so that it fits better in the bitmap helper usage.

Fixes: 16ee07bfa935 ("ALSA: usb-audio: Extend max number of channels to 64")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20261007172051.13240-8-tiwai@suse.de

0 files changed, 0 insertions, 0 deletions