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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: Suma Ramars <sramars@cisco.com>
Signed-off-by: Hiral Patel <hiralpat@cisco.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Suma Ramars 2013-09-09 13:31:48 -07:00 committed by James Bottomley
parent 87aa619c17
commit 318c7c4325
1 changed files with 0 additions and 32 deletions
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32
drivers/scsi/fnic/fnic_scsi.c
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@ -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 */