tree a024f65cc06de0de4a07271135cfb6c7d1ec3864
parent f3990e610a157e9c36af85a75bc66260dff31f40
author Clemens Ladisch <clemens@ladisch.de> 1235990750 +0100
committer Takashi Iwai <tiwai@suse.de> 1236001798 +0100

sound: usb-audio: fix rules check for 32-channel devices

When storing the channel numbers used by a format, and if the device
happens to support 32 channels, the code would try to store 1<<32 in
a 32-bit value.

Since no valid format can have zero channels, we can use 1<<(channels-1)
instead of 1<<channels so that all the channel numbers that we test for
fit into 32 bits.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>