From: Kalesh AP <kalesh-anakkur.purayil@xxxxxxxxxxxx>
There is a possibility that ulp_irq_stop and ulp_irq_start
callbacks will be called when the device is in detached state.
This can cause a crash due to NULL pointer dereference as
the rdev is already freed.
Fixes: cc5b9b48d447 ("RDMA/bnxt_re: Recover the device when FW error is detected")
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@xxxxxxxxxxxx>
Signed-off-by: Selvin Xavier <selvin.xavier@xxxxxxxxxxxx>
---
drivers/infiniband/hw/bnxt_re/main.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c
index c4c3d67..89ac5c2 100644
--- a/drivers/infiniband/hw/bnxt_re/main.c
+++ b/drivers/infiniband/hw/bnxt_re/main.c
@@ -438,6 +438,8 @@ static void bnxt_re_stop_irq(void *handle, bool reset)
int indx;
rdev = en_info->rdev;
+ if (!rdev)
+ return;
rcfw = &rdev->rcfw;
if (reset) {
@@ -466,6 +468,8 @@ static void bnxt_re_start_irq(void *handle, struct bnxt_msix_entry *ent)
int indx, rc;
rdev = en_info->rdev;
+ if (!rdev)
+ return;
msix_ent = rdev->nqr->msix_entries;
rcfw = &rdev->rcfw;
if (!ent) {
@@ -2438,6 +2442,7 @@ static int bnxt_re_suspend(struct auxiliary_device *adev, pm_message_t state)
ibdev_info(&rdev->ibdev, "%s: L2 driver notified to stop en_state 0x%lx",
__func__, en_dev->en_state);
bnxt_re_remove_device(rdev, BNXT_RE_PRE_RECOVERY_REMOVE, adev);
+ bnxt_re_update_en_info_rdev(NULL, en_info, adev);
mutex_unlock(&bnxt_re_mutex);
return 0;
--
2.5.5
