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>

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 05fbb4765d706a1f2261efef211cdcfdc6e23d37..e3ff07f342dc3e37c91837b61ee54e099440e6f4 100644 (file)
--- 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++) {