From: Suma Ramars <sramars@cisco.com>
Date: Mon, 9 Sep 2013 20:31:48 +0000 (-0700)
Subject: [SCSI] fnic: Remove QUEUE_FULL handling code
X-Git-Tag: upstream/snapshot3+hdmi~4297^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=318c7c4325ad2c4e969a0b79008192ce8c054463;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

[SCSI] fnic: Remove QUEUE_FULL handling code

Remove fnic driver QUEUE_FULL handling code instead let SCSI mid layer
handle queue full and use its algorithm to ramp down/up queue

Signed-off-by: Suma Ramars <sramars@cisco.com>
Signed-off-by: Hiral Patel <hiralpat@cisco.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---

diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
index a97e6e5..4ff0a33 100644
--- a/drivers/scsi/fnic/fnic_scsi.c
+++ b/drivers/scsi/fnic/fnic_scsi.c
@@ -818,38 +818,6 @@ static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
 		if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
 			xfer_len -= icmnd_cmpl->residual;
 
-		/*
-		 * If queue_full, then try to reduce queue depth for all
-		 * LUNS on the target. Todo: this should be accompanied
-		 * by a periodic queue_depth rampup based on successful
-		 * IO completion.
-		 */
-		if (icmnd_cmpl->scsi_status == QUEUE_FULL) {
-			struct scsi_device *t_sdev;
-			int qd = 0;
-
-			shost_for_each_device(t_sdev, sc->device->host) {
-				if (t_sdev->id != sc->device->id)
-					continue;
-
-				if (t_sdev->queue_depth > 1) {
-					qd = scsi_track_queue_full
-						(t_sdev,
-						 t_sdev->queue_depth - 1);
-					if (qd == -1)
-						qd = t_sdev->host->cmd_per_lun;
-					shost_printk(KERN_INFO,
-						     fnic->lport->host,
-						     "scsi[%d:%d:%d:%d"
-						     "] queue full detected,"
-						     "new depth = %d\n",
-						     t_sdev->host->host_no,
-						     t_sdev->channel,
-						     t_sdev->id, t_sdev->lun,
-						     t_sdev->queue_depth);
-				}
-			}
-		}
 		break;
 
 	case FCPIO_TIMEOUT:          /* request was timed out */