1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index d6894bd67980..35487e30b0ff 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -883,7 +883,18 @@ static void ahci_host_intr(struct ata_port *ap)
                 }
         }
 
-        /* spurious interrupt */
+        /* hmmm... a spurious interupt */
+
+        /* ignore interim PIO setup fis interrupts */
+        if (ata_tag_valid(ap->active_tag)) {
+                struct ata_queued_cmd *qc =
+                        ata_qc_from_tag(ap, ap->active_tag);
+
+                if (qc && qc->tf.protocol == ATA_PROT_PIO &&
+                    (status & PORT_IRQ_PIOS_FIS))
+                        return;
+        }
+
         if (ata_ratelimit())
                 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
                                 "(irq_stat 0x%x active_tag %d)\n",