From: Mark Lord <kernel@teksavvy.com>
Date: Fri, 20 Aug 2010 01:40:44 +0000 (-0400)
Subject: sata_mv: fix broken DSM/TRIM support (v2)
X-Git-Tag: v2.6.36-rc3~20^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=44b733809a5aba7f6b15a548d31a56d25bf3851c;p=pandora-kernel.git

sata_mv: fix broken DSM/TRIM support (v2)

Fix DSM/TRIM commands in sata_mv (v2).
These need to be issued using old-school "BM DMA",
rather than via the EDMA host queue.

Since the chips don't have proper BM DMA status,
we need to be more careful with setting the ATA_DMA_INTR bit,
since DSM/TRIM often has a long delay between "DMA complete"
and "command complete".

GEN_I chips don't have BM DMA, so no TRIM for them.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Cc: stable@kernel.org
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