[PATCH] libata: set PIO-0 after successful EH reset

Set ata_device->pio_mode to XFER_PIO_0 after a successful reset.  This
is to keep EH resets consistent with probe resets as updated by the
commit b6079ca409bf88c248992e96510dd6f610f7ed89.  Note that, with
soon-to-follow hotplug update, EH resets will include probe resets.

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

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/scsi/libata-eh.c b/drivers/scsi/libata-eh.c
index 71b45ad2c124..b88f492eab12 100644
--- a/drivers/scsi/libata-eh.c
+++ b/drivers/scsi/libata-eh.c
@@ -1287,7 +1287,7 @@ static int ata_eh_reset(struct ata_port *ap, ata_reset_fn_t softreset,
         unsigned int classes[ATA_MAX_DEVICES];
         int tries = ATA_EH_RESET_TRIES;
         ata_reset_fn_t reset;
-        int rc;
+        int i, rc;
 
         if (softreset && (!hardreset || (!sata_set_spd_needed(ap) &&
                                          !(ehc->i.action & ATA_EH_HARDRESET))))
@@ -1319,6 +1319,12 @@ static int ata_eh_reset(struct ata_port *ap, ata_reset_fn_t softreset,
         }
 
         if (rc == 0) {
+                /* After the reset, the device state is PIO 0 and the
+                 * controller state is undefined.  Record the mode.
+                 */
+                for (i = 0; i < ATA_MAX_DEVICES; i++)
+                        ap->device[i].pio_mode = XFER_PIO_0;
+
                 if (postreset)
                         postreset(ap, classes);