From: James Smart <jsmart2021@gmail.com>
Date: Tue, 12 Mar 2019 16:30:19 -0700
Subject: [PATCH] scsi: lpfc: Fix io lost on host resets
References: bsc#1136217,jsc#SLE-4722
Git-commit: c66a91974634bfdf9d8e8736219d3b27621fa704
Patch-mainline: v5.2-rc1
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>
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
drivers/scsi/lpfc/lpfc_init.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index e69bbfb06a65..2e0c61d4e9e8 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -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++) {
--
2.16.4