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authorJames Smart <jsmart2021@gmail.com>2018-06-26 08:24:24 -0700
committerMartin K. Petersen <martin.petersen@oracle.com>2018-07-10 22:15:08 -0400
commitd580c6137476ab307a66e278cf7dbc666230f714 (patch)
tree33a50da972c8fe4878c26172154a74518fe20f85 /drivers/scsi/lpfc
parent5cc167ddb7441013e2b5a5f47bf11af0264bb3e8 (diff)
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 <dick.kennedy@broadcom.com> Signed-off-by: James Smart <james.smart@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/lpfc')
-rw-r--r--drivers/scsi/lpfc/lpfc_nvme.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/scsi/lpfc/lpfc_nvme.c b/drivers/scsi/lpfc/lpfc_nvme.c
index 76a5a99605aa..ada5a2aaee82 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);