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@xxxxxxxxxxxx>
Signed-off-by: James Smart <james.smart@xxxxxxxxxxxx>
---
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 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);
--
2.13.1
