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-rw-r--r--net/rose/af_rose.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index 1e8eeb044b07..e7a872207b46 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -65,6 +65,26 @@ static const struct proto_ops rose_proto_ops;
ax25_address rose_callsign;
/*
+ * ROSE network devices are virtual network devices encapsulating ROSE
+ * frames into AX.25 which will be sent through an AX.25 device, so form a
+ * special "super class" of normal net devices; split their locks off into a
+ * separate class since they always nest.
+ */
+static struct lock_class_key rose_netdev_xmit_lock_key;
+
+static void rose_set_lockdep_one(struct net_device *dev,
+ struct netdev_queue *txq,
+ void *_unused)
+{
+ lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
+}
+
+static void rose_set_lockdep_key(struct net_device *dev)
+{
+ netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
+}
+
+/*
* Convert a ROSE address into text.
*/
char *rose2asc(char *buf, const rose_address *addr)
@@ -1511,6 +1531,7 @@ static int __init rose_proto_init(void)
free_netdev(dev);
goto fail;
}
+ rose_set_lockdep_key(dev);
dev_rose[i] = dev;
}