1 files changed, 10 insertions, 24 deletions

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index ad169ffbc4cb..80c655f85bc8 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -1134,30 +1134,16 @@ static int mv_qc_defer(struct ata_queued_cmd *qc)
         if (ap->nr_active_links == 0)
                 return 0;
 
-        if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
-                /*
-                 * The port is operating in host queuing mode (EDMA).
-                 * It can accomodate a new qc if the qc protocol
-                 * is compatible with the current host queue mode.
-                 */
-                if (pp->pp_flags & MV_PP_FLAG_NCQ_EN) {
-                        /*
-                         * The host queue (EDMA) is in NCQ mode.
-                         * If the new qc is also an NCQ command,
-                         * then allow the new qc.
-                         */
-                        if (qc->tf.protocol == ATA_PROT_NCQ)
-                                return 0;
-                } else {
-                        /*
-                         * The host queue (EDMA) is in non-NCQ, DMA mode.
-                         * If the new qc is also a non-NCQ, DMA command,
-                         * then allow the new qc.
-                         */
-                        if (qc->tf.protocol == ATA_PROT_DMA)
-                                return 0;
-                }
-        }
+        /*
+         * The port is operating in host queuing mode (EDMA) with NCQ
+         * enabled, allow multiple NCQ commands.  EDMA also allows
+         * queueing multiple DMA commands but libata core currently
+         * doesn't allow it.
+         */
+        if ((pp->pp_flags & MV_PP_FLAG_EDMA_EN) &&
+            (pp->pp_flags & MV_PP_FLAG_NCQ_EN) && ata_is_ncq(qc->tf.protocol))
+                return 0;
+
         return ATA_DEFER_PORT;
 }