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hpsa: check for ctlr lockup after command allocation in main io path 

Command allocation is the thing that takes the longest in the main i/o
path, so check for controller lockup immediately after this to prevent
submitting commands to locked up controller as much as possible.

Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
hifive-unleashed-5.1
Stephen Cameron 2015-01-23 16:44:19 -06:00 committed by James Bottomley
parent 07543e0c05
commit 407863cb9d
1 changed files with 8 additions and 1 deletions
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9
drivers/scsi/hpsa.c
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@ -4097,8 +4097,15 @@ static int hpsa_scsi_queue_command(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
return SCSI_MLQUEUE_HOST_BUSY;
}
if (unlikely(lockup_detected(h))) {
cmd->result = DID_ERROR << 16;
cmd_free(h, c);
cmd->scsi_done(cmd);
return 0;
}
/* Call alternate submit routine for I/O accelerated commands.
/*
* Call alternate submit routine for I/O accelerated commands.
* Retries always go down the normal I/O path.
*/
if (likely(cmd->retries == 0 &&