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path: root/drivers/net/ifb.c
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Diffstat (limited to 'drivers/net/ifb.c')
-rw-r--r--drivers/net/ifb.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c
index ccbd6554f6eb..897b05e79ed0 100644
--- a/drivers/net/ifb.c
+++ b/drivers/net/ifb.c
@@ -229,14 +229,20 @@ module_param(numifbs, int, 0);
229MODULE_PARM_DESC(numifbs, "Number of ifb devices"); 229MODULE_PARM_DESC(numifbs, "Number of ifb devices");
230 230
231/* 231/*
232 * dev_ifb->tx_queue.lock is usually taken after dev->rx_queue.lock, 232 * dev_ifb's TX queue lock is usually taken after dev->rx_queue.lock,
233 * reversely to e.g. qdisc_lock_tree(). It should be safe until 233 * reversely to e.g. qdisc_lock_tree(). It should be safe until
234 * ifb doesn't take dev->tx_queue.lock with dev_ifb->rx_queue.lock. 234 * ifb doesn't take dev's TX queue lock with dev_ifb->rx_queue.lock.
235 * But lockdep should know that ifb has different locks from dev. 235 * But lockdep should know that ifb has different locks from dev.
236 */ 236 */
237static struct lock_class_key ifb_tx_queue_lock_key; 237static struct lock_class_key ifb_tx_queue_lock_key;
238static struct lock_class_key ifb_rx_queue_lock_key; 238static struct lock_class_key ifb_rx_queue_lock_key;
239 239
240static void set_tx_lockdep_key(struct net_device *dev,
241 struct netdev_queue *txq,
242 void *_unused)
243{
244 lockdep_set_class(&txq->lock, &ifb_tx_queue_lock_key);
245}
240 246
241static int __init ifb_init_one(int index) 247static int __init ifb_init_one(int index)
242{ 248{
@@ -258,7 +264,7 @@ static int __init ifb_init_one(int index)
258 if (err < 0) 264 if (err < 0)
259 goto err; 265 goto err;
260 266
261 lockdep_set_class(&dev_ifb->tx_queue.lock, &ifb_tx_queue_lock_key); 267 netdev_for_each_tx_queue(dev_ifb, set_tx_lockdep_key, NULL);
262 lockdep_set_class(&dev_ifb->rx_queue.lock, &ifb_rx_queue_lock_key); 268 lockdep_set_class(&dev_ifb->rx_queue.lock, &ifb_rx_queue_lock_key);
263 269
264 return 0; 270 return 0;