PATCH: Add ->set_mode hook for odd drivers

[Alan Cox <alan@lxorguk.ukuu.org.uk>]

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> (and the previous diff)

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 1cb9813..18d5239 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -1409,7 +1415,11 @@ static int ata_bus_probe(struct ata_port
 	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 9fcc061..26e0351 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -429,6 +438,7 @@ 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);