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scsi: lpfc: Fix io lost on host resets 

If the driver undergoes repeated host resets it starts losing exchange
structures and eventually returns SCSI_MLQUEUE_HOST_BUSY and does not
recover. The offline path is not reclaiming the outstanding ios on the fcp
pring txcmplq before calling lpfc_destroy_multixripool, which causes the
txmcplq to be reinit and the resources lost.

Flush the fcp rings before destroying the multixripools.

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 2019-03-12 16:30:19 -07:00 committed by Martin K. Petersen
parent e8869f5b0a
commit c66a919746
1 changed files with 7 additions and 0 deletions
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7
drivers/scsi/lpfc/lpfc_init.c
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@ -3250,6 +3250,13 @@ void lpfc_destroy_multixri_pools(struct lpfc_hba *phba)
if (phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME)
lpfc_destroy_expedite_pool(phba);
if (!(phba->pport->load_flag & FC_UNLOADING)) {
lpfc_sli_flush_fcp_rings(phba);
if (phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME)
lpfc_sli_flush_nvme_rings(phba);
}
hwq_count = phba->cfg_hdw_queue;
for (i = 0; i < hwq_count; i++) {