From d580c6137476ab307a66e278cf7dbc666230f714 Mon Sep 17 00:00:00 2001 From: James Smart Date: Tue, 26 Jun 2018 08:24:24 -0700 Subject: [PATCH] scsi: lpfc: Fix panic if driver unloaded when port is offline System crashes when the lpfc module is unloaded after making the port offline The nvme queue pointers were freed during port offline, but were later accessed in pci remove path. Validate the pointers in pci remove path before accessing them. Signed-off-by: Dick Kennedy Signed-off-by: James Smart Signed-off-by: Martin K. Petersen --- drivers/scsi/lpfc/lpfc_nvme.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/lpfc/lpfc_nvme.c b/drivers/scsi/lpfc/lpfc_nvme.c index 76a5a99..ada5a2a 100644 --- a/drivers/scsi/lpfc/lpfc_nvme.c +++ b/drivers/scsi/lpfc/lpfc_nvme.c @@ -2970,7 +2970,7 @@ lpfc_nvme_wait_for_io_drain(struct lpfc_hba *phba) struct lpfc_sli_ring *pring; u32 i, wait_cnt = 0; - if (phba->sli_rev < LPFC_SLI_REV4) + if (phba->sli_rev < LPFC_SLI_REV4 || !phba->sli4_hba.nvme_wq) return; /* Cycle through all NVME rings and make sure all outstanding @@ -2979,6 +2979,9 @@ lpfc_nvme_wait_for_io_drain(struct lpfc_hba *phba) for (i = 0; i < phba->cfg_nvme_io_channel; i++) { pring = phba->sli4_hba.nvme_wq[i]->pring; + if (!pring) + continue; + /* Retrieve everything on the txcmplq */ while (!list_empty(&pring->txcmplq)) { msleep(LPFC_XRI_EXCH_BUSY_WAIT_T1); -- 2.7.4