[PATCH] libata: PIO 0

Ensure the pio_mode is always setup. Don't do any setup on the controller b
just ensure the mode reporting is valid to avoid tons of special cases
in PATA driver code when mode switching on the fly.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index e891b83be10f..45b6b29bc10f 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -1498,6 +1498,12 @@ static int ata_bus_probe(struct ata_port *ap)
                 if (classes[i] == ATA_DEV_UNKNOWN)
                         classes[i] = ATA_DEV_NONE;
 
+        /* 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;
+
         /* read IDENTIFY page and configure devices */
         for (i = 0; i < ATA_MAX_DEVICES; i++) {
                 dev = &ap->device[i];