1 files changed, 8 insertions, 3 deletions

diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c
index bb2409e761d0..65dc65304f51 100644
--- a/drivers/scsi/sata_mv.c
+++ b/drivers/scsi/sata_mv.c
@@ -1380,12 +1380,12 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant,
                 struct ata_port *ap = host_set->ports[port];
                 struct mv_port_priv *pp = ap->private_data;
 
-                hard_port = port & MV_PORT_MASK;        /* range 0-3 */
+                hard_port = mv_hardport_from_port(port); /* range 0..3 */
                 handled = 0;    /* ensure ata_status is set if handled++ */
 
                 /* Note that DEV_IRQ might happen spuriously during EDMA,
-                 * and should be ignored in such cases.  We could mask it,
-                 * but it's pretty rare and may not be worth the overhead.
+                 * and should be ignored in such cases.
+                 * The cause of this is still under investigation.
                  */ 
                 if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
                         /* EDMA: check for response queue interrupt */
@@ -1399,6 +1399,11 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant,
                                 ata_status = readb((void __iomem *)
                                            ap->ioaddr.status_addr);
                                 handled = 1;
+                                /* ignore spurious intr if drive still BUSY */
+                                if (ata_status & ATA_BUSY) {
+                                        ata_status = 0;
+                                        handled = 0;
+                                }
                         }
                 }