netdev - [PATCH net-next 01/13] net: eql: add net device refcount tracker

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Date:   Mon,  6 Dec 2021 17:30:27 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH net-next 01/13] net: eql: add net device refcount tracker

From: Eric Dumazet <edumazet@...gle.com>

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 drivers/net/eql.c      | 4 ++--
 include/linux/if_eql.h | 1 +
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/eql.c b/drivers/net/eql.c
index 8ef34901c2d8eef46ade52600c31359042463297..1111d1f33865edc7f98e7057118c9e4b8c8d327b 100644
--- a/drivers/net/eql.c
+++ b/drivers/net/eql.c
@@ -225,7 +225,7 @@ static void eql_kill_one_slave(slave_queue_t *queue, slave_t *slave)
 	list_del(&slave->list);
 	queue->num_slaves--;
 	slave->dev->flags &= ~IFF_SLAVE;
-	dev_put(slave->dev);
+	dev_put_track(slave->dev, &slave->dev_tracker);
 	kfree(slave);
 }
 
@@ -399,7 +399,7 @@ static int __eql_insert_slave(slave_queue_t *queue, slave_t *slave)
 		if (duplicate_slave)
 			eql_kill_one_slave(queue, duplicate_slave);
 
-		dev_hold(slave->dev);
+		dev_hold_track(slave->dev, &slave->dev_tracker, GFP_ATOMIC);
 		list_add(&slave->list, &queue->all_slaves);
 		queue->num_slaves++;
 		slave->dev->flags |= IFF_SLAVE;
diff --git a/include/linux/if_eql.h b/include/linux/if_eql.h
index d984694c384d7dde37b7b1f9ac0a90e6ef7bb87f..d75601d613cc6859b692ab3a41b55893e5921dd9 100644
--- a/include/linux/if_eql.h
+++ b/include/linux/if_eql.h
@@ -26,6 +26,7 @@
 typedef struct slave {
 	struct list_head	list;
 	struct net_device	*dev;
+	netdevice_tracker	dev_tracker;
 	long			priority;
 	long			priority_bps;
 	long			priority_Bps;
-- 
2.34.1.400.ga245620fadb-goog