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>
diff --git a/include/linux/ata.h b/include/linux/ata.h
index b666b77..fed3641 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -704,9 +704,19 @@
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)