From: Roland Dreier <rolandd@cisco.com>
Date: Mon, 15 Oct 2007 03:40:27 +0000 (-0700)
Subject: IB/mthca: Avoid alignment traps when writing doorbells
X-Git-Tag: v2.6.24-rc1~27^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ab8403c424a35364a3a2c753f7c5917fcbb4d809;p=pandora-kernel.git

IB/mthca: Avoid alignment traps when writing doorbells

Architectures such as ia64 see alignment traps when doing a 64-bit
read from __be32 doorbell[2] arrays to do doorbell writes in
mthca_write64().  Fix this by just passing the two halves of the
doorbell value into mthca_write64().  This actually improves the
generated code by allowing the compiler to see what's going on better.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
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