[PATCH 10/10] zfcp: Adapt change_queue_depth for queue full tracking

[Vasu Dev <vasu.dev@intel.com>]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

Adapt the change_queue_depth callback in zfcp for the new reason
parameter. Simply pass each call back to the SCSI midlayer, there are
no resource adjustments necessary for zfcp.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Vasu Dev <vasu.dev@intel.com>
---

 drivers/s390/scsi/zfcp_scsi.c |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index bdff1bf..287ebb8 100644
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -31,9 +31,21 @@ char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu)
 static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth,
 					int reason)
 {
-	if (reason != SCSI_QDEPTH_DEFAULT)
+	switch (reason) {
+	case SCSI_QDEPTH_DEFAULT:
+		scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
+		break;
+	case SCSI_QDEPTH_QFULL:
+		scsi_track_queue_full(sdev, depth);
+		break;
+	case SCSI_QDEPTH_RAMP_UP:
+		if (depth <= default_depth)
+			scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev),
+						depth);
+		break;
+	default:
 		return -EOPNOTSUPP;
-	scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
+	}
 	return sdev->queue_depth;
 }