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Date: Wed, 29 May 2019 20:06:02 -0700 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Dick Kennedy <dick.kennedy@...adcom.com>, James Smart <jsmart2021@...il.com>, "Martin K. Petersen" <martin.petersen@...cle.com>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.1 364/405] scsi: lpfc: Fix io lost on host resets [ Upstream commit c66a91974634bfdf9d8e8736219d3b27621fa704 ] 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@...adcom.com> Signed-off-by: James Smart <jsmart2021@...il.com> Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com> Signed-off-by: Sasha Levin <sashal@...nel.org> --- 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 7fcdaed3fa945..89a0c2bdb6a15 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -3245,6 +3245,13 @@ 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++) { -- 2.20.1
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