From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Fri, 23 Jul 2010 11:02:54 +0000 (+0200)
Subject: firewire: core: fix upper bound of possible CSR allocations
X-Git-Tag: v2.6.36-rc1~490^2^3~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c9ae701ae1caf657326db22d61074b40a747c9d;p=pandora-kernel.git

firewire: core: fix upper bound of possible CSR allocations

region->end is defined as an upper bound of the requested address range,
exclusive --- i.e. as an address outside of the range in which the
requested CSR is to be placed.

Hence 0x0001,0000,0000,0000 is the biggest valid region->end, not
0x0000,ffff,ffff,fffc like the current check asserted.

For simplicity, the fix drops the region->end & 3 test because there is
no actual problem with these bits set in region->end.  The allocated
address range will be quadlet aligned and of a size of multiple quadlets
due to the checks for region->start & 3 and handler->length & 3 alone.

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