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libata: fix DMA to stack in reading devslp_timing parameters 

Commit 803739d25c ("[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>
This commit is contained in:
David Woodhouse 2013-03-29 11:54:55 +00:00 committed by Jeff Garzik
parent b55f84e2d5
commit 8e725c7f8a
1 changed files with 1 additions and 1 deletions
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2
drivers/ata/libata-core.c
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@ -2329,7 +2329,7 @@ int ata_dev_configure(struct ata_device *dev)
* from SATA Settings page of Identify Device Data Log.
*/
if (ata_id_has_devslp(dev->id)) {
u8 sata_setting[ATA_SECT_SIZE];
u8 *sata_setting = ap->sector_buf;
int i, j;
dev->flags |= ATA_DFLAG_DEVSLP;