4 files changed, 17 insertions, 3 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 9812bbf05e62..1845119cc7f0 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2396,6 +2396,7 @@ int ata_dev_configure(struct ata_device *dev)
         else if (dev->class == ATA_DEV_ATAPI) {
                 const char *cdb_intr_string = "";
                 const char *atapi_an_string = "";
+                const char *dma_dir_string = "";
                 u32 sntf;
 
                 rc = atapi_cdb_len(id);
@@ -2436,13 +2437,19 @@ int ata_dev_configure(struct ata_device *dev)
                         cdb_intr_string = ", CDB intr";
                 }
 
+                if (atapi_dmadir || atapi_id_dmadir(dev->id)) {
+                        dev->flags |= ATA_DFLAG_DMADIR;
+                        dma_dir_string = ", DMADIR";
+                }
+
                 /* print device info to dmesg */
                 if (ata_msg_drv(ap) && print_info)
                         ata_dev_printk(dev, KERN_INFO,
-                                       "ATAPI: %s, %s, max %s%s%s\n",
+                                       "ATAPI: %s, %s, max %s%s%s%s\n",
                                        modelbuf, fwrevbuf,
                                        ata_mode_string(xfer_mask),
-                                       cdb_intr_string, atapi_an_string);
+                                       cdb_intr_string, atapi_an_string,
+                                       dma_dir_string);
         }
 
         /* determine max_sectors */
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index f888babc8283..0562b0a49f3b 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2582,7 +2582,8 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
                 qc->tf.protocol = ATAPI_PROT_DMA;
                 qc->tf.feature |= ATAPI_PKT_DMA;
 
-                if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
+                if ((dev->flags & ATA_DFLAG_DMADIR) &&
+                    (scmd->sc_data_direction != DMA_TO_DEVICE))
                         /* some SATA bridges need us to indicate data xfer direction */
                         qc->tf.feature |= ATAPI_DMADIR;
         }
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 78bbacaed8c4..1c622e2b0504 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -659,6 +659,11 @@ static inline int atapi_command_packet_set(const u16 *dev_id)
         return (dev_id[0] >> 8) & 0x1f;
 }
 
+static inline int atapi_id_dmadir(const u16 *dev_id)
+{
+        return ata_id_major_version(dev_id) >= 7 && (dev_id[62] & 0x8000);
+}
+
 static inline int is_multi_taskfile(struct ata_taskfile *tf)
 {
         return (tf->command == ATA_CMD_READ_MULTI) ||
diff --git a/include/linux/libata.h b/include/linux/libata.h
index ce7603a73156..a05f60013642 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -138,6 +138,7 @@ enum {
         ATA_DFLAG_AN            = (1 << 7), /* AN configured */
         ATA_DFLAG_HIPM          = (1 << 8), /* device supports HIPM */
         ATA_DFLAG_DIPM          = (1 << 9), /* device supports DIPM */
+        ATA_DFLAG_DMADIR        = (1 << 10), /* device requires DMADIR */
         ATA_DFLAG_CFG_MASK      = (1 << 12) - 1,
 
         ATA_DFLAG_PIO           = (1 << 12), /* device limited to PIO mode */