libata: fix DMA to stack in reading devslp_timing parameters
authorDavid Woodhouse <dwmw2@infradead.org>
Fri, 29 Mar 2013 11:54:55 +0000 (11:54 +0000)
committerJeff Garzik <jgarzik@redhat.com>
Wed, 3 Apr 2013 23:45:57 +0000 (19:45 -0400)
commit8e725c7f8a60feaa88edacd4dee2c754d5ae7706
treec1cec8594972926936365b124a10a5ce05233265
parentb55f84e2d527182e7c611d466cd0bb6ddce201de
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>
drivers/ata/libata-core.c