From: Catalin Marinas <catalin.marinas@arm.com>
Date: Thu, 4 Feb 2010 06:04:50 +0000 (-0500)
Subject: [libata] Call flush_dcache_page after PIO data transfers in libata-sff.c
X-Git-Tag: v2.6.33-rc7~5^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2d68b7fe55d9e19a8a868224ed0dfd6526568521;p=pandora-kernel.git

[libata] Call flush_dcache_page after PIO data transfers in libata-sff.c

flush_dcache_page() must be called after (!ATA_TFLAG_WRITE) the
data copying to avoid D-cache aliasing with user space or I-D cache
coherency issues (when reading data from an ATA device using PIO,
the kernel dirties the D-cache but there is no flush_dcache_page()
required on Harvard architectures).

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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