can: dump stack on protocol bugs

[mirror_ubuntu-bionic-kernel.git] / net / can / af_can.c

diff --git a/net/can/af_can.c b/net/can/af_can.c
index 8bacf281b3ee0b0ee42c2b10c8f7c23550e7ca9b..c4e50852c9f4aa8e195ed57e711890210cea1e1c 100644 (file)
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -546,16 +546,13 @@ void can_rx_unregister(struct net_device *dev, canid_t can_id, canid_t mask,
        }
 
        /*
-        * Check for bugs in CAN protocol implementations:
-        * If no matching list item was found, the list cursor variable next
-        * will be NULL, while r will point to the last item of the list.
+        * Check for bugs in CAN protocol implementations using af_can.c:
+        * 'r' will be NULL if no matching list item was found for removal.
         */
 
        if (!r) {
-               pr_err("BUG: receive list entry not found for "
-                      "dev %s, id %03X, mask %03X\n",
-                      DNAME(dev), can_id, mask);
-               r = NULL;
+               WARN(1, "BUG: receive list entry not found for dev %s, "
+                    "id %03X, mask %03X\n", DNAME(dev), can_id, mask);
                goto out;
        }