[PATCH] libata-eh-fw: clear SError in ata_std_postreset()

Clear SError in ata_std_postreset().  This is to clear SError bits
which get set during reset.

Signed-off-by: Tejun Heo <htejun@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 9a97ebd59209..de2cd61a264d 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -2528,11 +2528,17 @@ int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
  */
 void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
 {
+        u32 serror;
+
         DPRINTK("ENTER\n");
 
         /* print link status */
         sata_print_link_status(ap);
 
+        /* clear SError */
+        if (sata_scr_read(ap, SCR_ERROR, &serror) == 0)
+                sata_scr_write(ap, SCR_ERROR, serror);
+
         /* re-enable interrupts */
         if (ap->ioaddr.ctl_addr)        /* FIXME: hack. create a hook instead */
                 ata_irq_on(ap);