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net: switchdev: add net device refcount tracker 

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2096377

commit 4fc003fe0313276f0d4ea996ab9b4acd9a5a5e93
Author: Eric Dumazet <edumazet@google.com>
Date:   Mon Dec 6 17:30:31 2021 -0800

    net: switchdev: add net device refcount tracker

    Signed-off-by: Eric Dumazet <edumazet@google.com>
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Signed-off-by: Ivan Vecera <ivecera@redhat.com>
This commit is contained in:
Ivan Vecera 2022-06-13 18:38:36 +02:00
parent 97636b0f94
commit 2a897ee6c2
1 changed files with 3 additions and 2 deletions
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5
net/switchdev/switchdev.c
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@ -28,6 +28,7 @@ typedef void switchdev_deferred_func_t(struct net_device *dev,
struct switchdev_deferred_item {
struct list_head list;
struct net_device *dev;
netdevice_tracker dev_tracker;
switchdev_deferred_func_t *func;
unsigned long data[];
};
@ -63,7 +64,7 @@ void switchdev_deferred_process(void)
while ((dfitem = switchdev_deferred_dequeue())) {
dfitem->func(dfitem->dev, dfitem->data);
dev_put(dfitem->dev);
dev_put_track(dfitem->dev, &dfitem->dev_tracker);
kfree(dfitem);
}
}
@ -90,7 +91,7 @@ static int switchdev_deferred_enqueue(struct net_device *dev,
dfitem->dev = dev;
dfitem->func = func;
memcpy(dfitem->data, data, data_len);
dev_hold(dev);
dev_hold_track(dev, &dfitem->dev_tracker, GFP_ATOMIC);
spin_lock_bh(&deferred_lock);
list_add_tail(&dfitem->list, &deferred);
spin_unlock_bh(&deferred_lock);