[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>

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index e891b83be10fd36e865549dd952f4f77d496e449..45b6b29bc10f4aef78badbb4193fe1abb4dc0379 100644 (file)
--- 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];