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Commit 318c7c43 authored by Suma Ramars's avatar Suma Ramars Committed by James Bottomley
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[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: default avatarSuma Ramars <sramars@cisco.com>
Signed-off-by: default avatarHiral Patel <hiralpat@cisco.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent 87aa619c

drivers/scsi/fnic/fnic_scsi.c

+0 −32
Original line number Diff line number Diff line
@@ -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 */