[PATCH] libata: kill SError clearing in sata_std_hardreset().

Don't clear SError in sata_std_hardreset().  This makes hardreset act
identically to ->phy_reset register-wise.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

drivers/scsi/libata-core.c

@@ -2018,8 +2018,6 @@ int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes)
  */
 int sata_std_hardreset(struct ata_port *ap, int verbose, unsigned int *class)
 {
-	u32 serror;
-
 	DPRINTK("ENTER\n");
 
 	/* Issue phy wake/reset */
@@ -2034,10 +2032,6 @@ int sata_std_hardreset(struct ata_port *ap, int verbose, unsigned int *class)
 	/* Bring phy back */
 	sata_phy_resume(ap);
 
-	/* Clear SError */
-	serror = scr_read(ap, SCR_ERROR);
-	scr_write(ap, SCR_ERROR, serror);
-
 	/* TODO: phy layer with polling, timeouts, etc. */
 	if (!sata_dev_present(ap)) {
 		*class = ATA_DEV_NONE;