[SCSI] qla2xxx: Add change_queue_depth/type() API support.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/qla2xxx/qla_os.c

@@ -111,6 +111,9 @@ static int qla2xxx_eh_host_reset(struct scsi_cmnd *);
 static int qla2x00_loop_reset(scsi_qla_host_t *ha);
 static int qla2x00_device_reset(scsi_qla_host_t *, fc_port_t *);
 
+static int qla2x00_change_queue_depth(struct scsi_device *, int);
+static int qla2x00_change_queue_type(struct scsi_device *, int);
+
 static struct scsi_host_template qla2x00_driver_template = {
 	.module			= THIS_MODULE,
 	.name			= "qla2xxx",
@@ -125,6 +128,8 @@ static struct scsi_host_template qla2x00_driver_template = {
 
 	.slave_alloc		= qla2xxx_slave_alloc,
 	.slave_destroy		= qla2xxx_slave_destroy,
+	.change_queue_depth	= qla2x00_change_queue_depth,
+	.change_queue_type	= qla2x00_change_queue_type,
 	.this_id		= -1,
 	.cmd_per_lun		= 3,
 	.use_clustering		= ENABLE_CLUSTERING,
@@ -151,6 +156,8 @@ static struct scsi_host_template qla24xx_driver_template = {
 
 	.slave_alloc		= qla2xxx_slave_alloc,
 	.slave_destroy		= qla2xxx_slave_destroy,
+	.change_queue_depth	= qla2x00_change_queue_depth,
+	.change_queue_type	= qla2x00_change_queue_type,
 	.this_id		= -1,
 	.cmd_per_lun		= 3,
 	.use_clustering		= ENABLE_CLUSTERING,
@@ -1109,6 +1116,28 @@ qla2xxx_slave_destroy(struct scsi_device *sdev)
 	sdev->hostdata = NULL;
 }
 
+static int
+qla2x00_change_queue_depth(struct scsi_device *sdev, int qdepth)
+{
+	scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
+	return sdev->queue_depth;
+}
+
+static int
+qla2x00_change_queue_type(struct scsi_device *sdev, int tag_type)
+{
+	if (sdev->tagged_supported) {
+		scsi_set_tag_type(sdev, tag_type);
+		if (tag_type)
+			scsi_activate_tcq(sdev, sdev->queue_depth);
+		else
+			scsi_deactivate_tcq(sdev, sdev->queue_depth);
+	} else
+		tag_type = 0;
+
+	return tag_type;
+}
+
 /**
  * qla2x00_config_dma_addressing() - Configure OS DMA addressing method.
  * @ha: HA context