From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Tue, 27 Jul 2010 11:20:33 +0000 (+0200)
Subject: firewire: ohci: use memory barriers to order descriptor updates
X-Git-Tag: v2.6.36-rc1~490^2^3~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=071595ebdc66d70219e2d1ce746016f64b2b19e7;p=pandora-kernel.git

firewire: ohci: use memory barriers to order descriptor updates

When we append to a DMA program, we need to ensure that the order in
which initialization of the new descriptors and update of the
branch_address of the old tail descriptor, as seen by the PCI device,
happen as intended.

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