From: David Woodhouse <dwmw2@infradead.org>
Date: Fri, 29 Mar 2013 11:54:55 +0000 (+0000)
Subject: libata: fix DMA to stack in reading devslp_timing parameters
X-Git-Tag: v3.9-rc7~41^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8e725c7f8a60feaa88edacd4dee2c754d5ae7706;p=pandora-kernel.git

libata: fix DMA to stack in reading devslp_timing parameters

Commit 803739d25c2343da6d2f95eebdcbc08bf67097d4 ("[libata] replace
sata_settings with devslp_timing"), which was also Cc: stable, used a
stack buffer to receive data from ata_read_log_page(), which triggers
the following warning:
 ahci 0000:00:1f.2: DMA-API: device driver maps memory fromstack [addr=ffff880140469948]

Fix this by using ap->sector_buf instead of a stack buffer.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Cc: stable@kernel.org
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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