From: Clemens Ladisch <clemens@ladisch.de>
Date: Mon, 2 Mar 2009 10:45:50 +0000 (+0100)
Subject: sound: usb-audio: fix rules check for 32-channel devices
X-Git-Tag: v2.6.30-rc1~676^2~1^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eab2b553c3d3ed20698c4a9c7e049a60b804e2f5;p=pandora-kernel.git

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>
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