From: Martin K. Petersen <martin.petersen@oracle.com>
Date: Tue, 5 May 2015 01:54:21 +0000 (-0400)
Subject: libata: Fall back to unqueued READ LOG EXT if the DMA variant fails
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~115^2~22
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5d3abf8ff67f;p=pandora-kernel.git

libata: Fall back to unqueued READ LOG EXT if the DMA variant fails

Some devices advertise support for the READ/WRITE LOG DMA EXT commands
but fail when we try to issue them. This can lead to queued TRIM being
unintentionally disabled since the relevant feature flag is located in a
general purpose log page.

Fall back to unqueued READ LOG EXT if the DMA variant fails while
reading a log page.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
---

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