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scsi: lpfc: Fix RQ empty firmware trap

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When nvme target deferred receive logic waits for exchange resources,
the corresponding receive buffer is not replenished with the hardware.
This can result in a lack of asynchronous receive buffer resources in
the hardware, resulting in a "2885 Port Status Event: ... error
1=0x52004a01 ..." message.

Correct by replenishing the buffer whenenver the deferred logic kicks
in.  Update corresponding debug messages and statistics as well.

[mkp: applied by hand]

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart
2018-01-30 15:58:52 -08:00
committed by Martin K. Petersen
parent 91455b8509
commit 411de511c6
5 changed files with 51 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/scsi/lpfc/lpfc_sli.c
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@@ -6535,9 +6535,11 @@ lpfc_post_rq_buffer(struct lpfc_hba *phba, struct lpfc_queue *hrq,
struct lpfc_rqe hrqe;
struct lpfc_rqe drqe;
struct lpfc_rqb *rqbp;
unsigned long flags;
struct rqb_dmabuf *rqb_buffer;
LIST_HEAD(rqb_buf_list);
spin_lock_irqsave(&phba->hbalock, flags);
rqbp = hrq->rqbp;
for (i = 0; i < count; i++) {
/* IF RQ is already full, don't bother */
@@ -6561,6 +6563,15 @@ lpfc_post_rq_buffer(struct lpfc_hba *phba, struct lpfc_queue *hrq,
drqe.address_hi = putPaddrHigh(rqb_buffer->dbuf.phys);
rc = lpfc_sli4_rq_put(hrq, drq, &hrqe, &drqe);
if (rc < 0) {
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"6421 Cannot post to HRQ %d: %x %x %x "
"DRQ %x %x\n",
hrq->queue_id,
hrq->host_index,
hrq->hba_index,
hrq->entry_count,
drq->host_index,
drq->hba_index);
rqbp->rqb_free_buffer(phba, rqb_buffer);
} else {
list_add_tail(&rqb_buffer->hbuf.list,
@@ -6568,6 +6579,7 @@ lpfc_post_rq_buffer(struct lpfc_hba *phba, struct lpfc_queue *hrq,
rqbp->buffer_count++;
}
}
spin_unlock_irqrestore(&phba->hbalock, flags);
return 1;
}