[PATCH] ahci: skip protocol test altogether in spurious interrupt code

Skip protocol test altogether in spurious interrupt code. If PIOS is received
when it shouldn't, ahci will raise protocol violation.

Signed-off-by: Unicorn Chang <uchang@tw.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 2 insertions, 8 deletions

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index 77e7202a0eba..904c25fb4ba4 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -940,14 +940,8 @@ static void ahci_host_intr(struct ata_port *ap)
                 return;
 
         /* 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_tag_valid(ap->active_tag) && (status & PORT_IRQ_PIOS_FIS)) 
+                return;
 
         if (ata_ratelimit())
                 ata_port_printk(ap, KERN_INFO, "spurious interrupt "