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@xxxxxxxxxx>
---
include/linux/ata.h | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/include/linux/ata.h b/include/linux/ata.h
index b666b773e111..fed36418dd1c 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -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)
--
1.9.3
--
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