[PATCH] libata: ATA_FLAG_IN_EH is not used, kill it

Kill unused flag ATA_FLAG_IN_EH.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/scsi/libata-scsi.c

@@ -779,20 +779,15 @@ enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd)
 
 int ata_scsi_error(struct Scsi_Host *host)
 {
-	struct ata_port *ap;
-	unsigned long flags;
+	struct ata_port *ap = (struct ata_port *)&host->hostdata[0];
 
 	DPRINTK("ENTER\n");
 
-	ap = (struct ata_port *) &host->hostdata[0];
+	/* synchronize with IRQ handler and port task */
+	spin_unlock_wait(&ap->host_set->lock);
+	ata_port_flush_task(ap);
 
-	spin_lock_irqsave(&ap->host_set->lock, flags);
-	WARN_ON(ap->flags & ATA_FLAG_IN_EH);
-	ap->flags |= ATA_FLAG_IN_EH;
 	WARN_ON(ata_qc_from_tag(ap, ap->active_tag) == NULL);
-	spin_unlock_irqrestore(&ap->host_set->lock, flags);
-
-	ata_port_flush_task(ap);
 
 	ap->ops->eng_timeout(ap);
 
@@ -800,10 +795,6 @@ int ata_scsi_error(struct Scsi_Host *host)
 
 	scsi_eh_flush_done_q(&ap->eh_done_q);
 
-	spin_lock_irqsave(&ap->host_set->lock, flags);
-	ap->flags &= ~ATA_FLAG_IN_EH;
-	spin_unlock_irqrestore(&ap->host_set->lock, flags);
-
 	DPRINTK("EXIT\n");
 	return 0;
 }

include/linux/libata.h

@@ -152,7 +152,6 @@ enum {
 	ATA_FLAG_IRQ_MASK	= (1 << 14), /* Mask IRQ in PIO xfers */
 
 	ATA_FLAG_FLUSH_PORT_TASK = (1 << 15), /* Flush port task */
-	ATA_FLAG_IN_EH		= (1 << 16), /* EH in progress */
 
 	ATA_QCFLAG_ACTIVE	= (1 << 1), /* cmd not yet ack'd to scsi lyer */
 	ATA_QCFLAG_SG		= (1 << 3), /* have s/g table? */