[PATCH] libata: Add ->set_mode hook for odd drivers

Some hardware doesn't want the usual mode setup logic running. This
allows the hardware driver to replace it for special cases in the least
invasive way possible.

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 8631056..10933cb 100644 (file)
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -1409,7 +1409,11 @@ static int ata_bus_probe(struct ata_port *ap)
        if (!found)
                goto err_out_disable;
 
-       ata_set_mode(ap);
+       if (ap->ops->set_mode)
+               ap->ops->set_mode(ap);
+       else
+               ata_set_mode(ap);
+
        if (ap->flags & ATA_FLAG_PORT_DISABLED)
                goto err_out_disable;
 

diff --git a/include/linux/libata.h b/include/linux/libata.h
index a5c213c..6a9316c 100644 (file)
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -433,6 +433,7 @@ struct ata_port_operations {
        void (*dev_select)(struct ata_port *ap, unsigned int device);
 
        void (*phy_reset) (struct ata_port *ap); /* obsolete */
+       void (*set_mode) (struct ata_port *ap);
        int (*probe_reset) (struct ata_port *ap, unsigned int *classes);
 
        void (*post_set_mode) (struct ata_port *ap);