[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 <[e-mail]>
Signed-off-by: Jeff Garzik <[e-mail]>

drivers/scsi/ahci.c

···
 		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 "