RDMA/i40iw: Add qp table lock around AE processing
QP may be freed during Async Event processing.
Add a lock around QP table to prevent it.
Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/hw/i40iw/i40iw_utils.c b/drivers/infiniband/hw/i40iw/i40iw_utils.c
index 1ceec81..7ed998c 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_utils.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_utils.c
@@ -506,14 +506,19 @@
struct cqp_commands_info *cqp_info;
struct i40iw_device *iwdev;
u32 qp_num;
+ unsigned long flags;
iwqp = to_iwqp(ibqp);
- if (!atomic_dec_and_test(&iwqp->refcount))
- return;
-
iwdev = iwqp->iwdev;
+ spin_lock_irqsave(&iwdev->qptable_lock, flags);
+ if (!atomic_dec_and_test(&iwqp->refcount)) {
+ spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
+ return;
+ }
+
qp_num = iwqp->ibqp.qp_num;
iwdev->qp_table[qp_num] = NULL;
+ spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
if (!cqp_request)
return;