From: Clemens Ladisch <clemens@ladisch.de>
Date: Mon, 12 Apr 2010 08:35:05 +0000 (+0200)
Subject: firewire: core: fix retries calculation in iso manage_channel()
X-Git-Tag: v2.6.34-rc6~64^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3a1f0a0e3d871e3d3e08a1429009992151becda8;p=pandora-kernel.git

firewire: core: fix retries calculation in iso manage_channel()

If there is a permanent error condition when communicating with the IRM,
after the sixth error, the retry variable will be decremented to -1.
If, in this case, the bits in channels_mask are not yet exhausted, the
next channel is retried 2^32 times.

To fix this, check that retry is never decremented beyond zero.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
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