Commit c9bbb75f authored by Oliver Hartkopp's avatar Oliver Hartkopp Committed by David S. Miller
Browse files

can: dump stack on protocol bugs

The rework of the kernel hlist implementation "hlist: drop the node parameter
from iterators" (b67bfe0d

) created some
fallout in the form of non matching comments and obsolete code.

Additionally to the cleanup this patch adds a WARN() statement to catch the
caller of the wrong filter removal request.
Signed-off-by: default avatarOliver Hartkopp <>
Signed-off-by: default avatarDavid S. Miller <>
parent 1bc277f7
......@@ -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;
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