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ax25: add net device refcount tracker

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Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2021-12-06 17:30:33 -08:00 • committed by Jakub Kicinski
parent e44b14ebae
commit 66ce07f780
2 changed files with 7 additions and 4 deletions
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3
include/net/ax25.h
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@ -229,7 +229,10 @@ struct ctl_table;
typedef struct ax25_dev { typedef struct ax25_dev {
struct ax25_dev *next; struct ax25_dev *next;
struct net_device *dev; struct net_device *dev;
netdevice_tracker dev_tracker;
struct net_device *forward; struct net_device *forward;
struct ctl_table_header *sysheader; struct ctl_table_header *sysheader;
int values[AX25_MAX_VALUES]; int values[AX25_MAX_VALUES];

8
net/ax25/ax25_dev.c
View file

@ -58,7 +58,7 @@ void ax25_dev_device_up(struct net_device *dev)
dev->ax25_ptr = ax25_dev; dev->ax25_ptr = ax25_dev;
ax25_dev->dev = dev; ax25_dev->dev = dev;
dev_hold(dev); dev_hold_track(dev, &ax25_dev->dev_tracker, GFP_ATOMIC);
ax25_dev->forward = NULL; ax25_dev->forward = NULL;
ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE; ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE;
@ -114,7 +114,7 @@ void ax25_dev_device_down(struct net_device *dev)
ax25_dev_list = s->next; ax25_dev_list = s->next;
spin_unlock_bh(&ax25_dev_lock); spin_unlock_bh(&ax25_dev_lock);
dev->ax25_ptr = NULL; dev->ax25_ptr = NULL;
dev_put(dev); dev_put_track(dev, &ax25_dev->dev_tracker);
kfree(ax25_dev); kfree(ax25_dev);
return; return;
} }
@ -124,7 +124,7 @@ void ax25_dev_device_down(struct net_device *dev)
s->next = ax25_dev->next; s->next = ax25_dev->next;
spin_unlock_bh(&ax25_dev_lock); spin_unlock_bh(&ax25_dev_lock);
dev->ax25_ptr = NULL; dev->ax25_ptr = NULL;
dev_put(dev); dev_put_track(dev, &ax25_dev->dev_tracker);
kfree(ax25_dev); kfree(ax25_dev);
return; return;
} }
@ -188,7 +188,7 @@ void __exit ax25_dev_free(void)
ax25_dev = ax25_dev_list; ax25_dev = ax25_dev_list;
while (ax25_dev != NULL) { while (ax25_dev != NULL) {
s = ax25_dev; s = ax25_dev;
dev_put(ax25_dev->dev); dev_put_track(ax25_dev->dev, &ax25_dev->dev_tracker);
ax25_dev = ax25_dev->next; ax25_dev = ax25_dev->next;
kfree(s); kfree(s);
} }