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scsi: lpfc: Fix NVME io abort failures causing hangs

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The nvme-fc transport may call to abort an io on controller reset. If the
driver is out of resources to issue an abort command, it just gives up and
does nothing. The transport expects the lldd to always be able to terminate
an io it has issued.  At that point, the controller hangs waiting for
aborted ios to be returned.  Note: flaged by "6136" and "6176" error
messages.

Root issue was the adapter mis-allocated the number resources it allocated
for command entries for the adapter.

Convert the driver to allocate command resources based on the number of
xris supported by the FC port - 1 resource for the original command and 1
resource for the abort request.

Link: https://lore.kernel.org/r/20190922035906.10977-5-jsmart2021@gmail.com
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart
2019-09-21 20:58:50 -07:00
committed by Martin K. Petersen
parent b7b95fb863
commit a5f7337f5a
4 changed files with 14 additions and 18 deletions
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9
drivers/scsi/lpfc/lpfc_init.c
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@@ -7126,7 +7126,7 @@ lpfc_init_iocb_list(struct lpfc_hba *phba, int iocb_count)
if (iocbq_entry == NULL) {
printk(KERN_ERR "%s: only allocated %d iocbs of "
"expected %d count. Unloading driver.\n",
__func__, i, LPFC_IOCB_LIST_CNT);
__func__, i, iocb_count);
goto out_free_iocbq;
}
@@ -11591,13 +11591,10 @@ fcponly:
}
/* If the NVME FC4 type is enabled, scale the sg_seg_cnt to
* accommodate 512K and 1M IOs in a single nvme buf and supply
* enough NVME LS iocb buffers for larger connectivity counts.
* accommodate 512K and 1M IOs in a single nvme buf.
*/
if (phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME) {
if (phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME)
phba->cfg_sg_seg_cnt = LPFC_MAX_NVME_SEG_CNT;
phba->cfg_iocb_cnt = 5;
}
/* Only embed PBDE for if_type 6, PBDE support requires xib be set */
if ((bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) !=