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libata: READ LOG DMA EXT support can be in either page 119 or 120 

Support for the READ/WRITE LOG DMA EXT commands can be signaled either
in page 119 or page 120. We should check both pages.

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>
This commit is contained in:
Martin K. Petersen 2015-05-04 21:54:20 -04:00 committed by Tejun Heo
parent f303074160
commit 406c057c4e
1 changed files with 11 additions and 1 deletions
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12
include/linux/ata.h
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@ -704,9 +704,19 @@ static inline bool ata_id_wcache_enabled(const u16 *id)
static inline bool ata_id_has_read_log_dma_ext(const u16 *id)
{
/* Word 86 must have bit 15 set */
if (!(id[ATA_ID_CFS_ENABLE_2] & (1 << 15)))
return false;
return id[ATA_ID_COMMAND_SET_3] & (1 << 3);
/* READ LOG DMA EXT support can be signaled either from word 119
* or from word 120. The format is the same for both words: Bit
* 15 must be cleared, bit 14 set and bit 3 set.
*/
if ((id[ATA_ID_COMMAND_SET_3] & 0xC008) == 0x4008 ||
(id[ATA_ID_COMMAND_SET_4] & 0xC008) == 0x4008)
return true;
return false;
}
static inline bool ata_id_has_sense_reporting(const u16 *id)