RDMA/cm: Abort loop in case of CM dequeue

In case CM work list is empty, the work pointer will be NULL,
so instead of kernel crash it is better to abort processing
of works.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index 7df4c7173607ef1a09838a8f0807a3df9e0342d5..724f123c037f9a980fb5d1e469589af1a49ccd53 100644 (file)
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -1707,7 +1707,9 @@ static void cm_process_work(struct cm_id_private *cm_id_priv,
                spin_lock_irq(&cm_id_priv->lock);
                work = cm_dequeue_work(cm_id_priv);
                spin_unlock_irq(&cm_id_priv->lock);
-               BUG_ON(!work);
+               if (!work)
+                       return;
+
                ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
                                                &work->cm_event);
                cm_free_work(work);