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[SCSI] lpfc: block target when port queueing limit is hit

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Instead of blocking the entire host when the port's
queueing limit is hit, we should only block the port's
target. This will allow IO to other ports to execute.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Acked-by: James Smart  <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Mike Christie 2011-02-25 14:04:28 -06:00 committed by James Bottomley
parent f55ca84d92
commit 3496343df5
1 changed files with 4 additions and 1 deletions
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5
drivers/scsi/lpfc/lpfc_scsi.c
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@ -3062,7 +3062,7 @@ lpfc_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
goto out_fail_command;
}
if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
goto out_host_busy;
goto out_tgt_busy;
lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
if (lpfc_cmd == NULL) {
@ -3179,6 +3179,9 @@ lpfc_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
out_host_busy:
return SCSI_MLQUEUE_HOST_BUSY;
out_tgt_busy:
return SCSI_MLQUEUE_TARGET_BUSY;
out_fail_command:
done(cmnd);
return 0;