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netdevice: add the case if dev is NULL

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commit b37a466837393af72fe8bcb8f1436410f3f173f3 upstream.

Add the case if dev is NULL in dev_{put, hold}, so the caller doesn't
need to care whether dev is NULL or not.

Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Pavel Machek <pavel@denx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yajun Deng 2021-08-05 19:54:34 +08:00 committed by Greg Kroah-Hartman
parent 655a405a6d
commit 574a12b444
1 changed files with 4 additions and 2 deletions
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6
include/linux/netdevice.h
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@ -3674,7 +3674,8 @@ void netdev_run_todo(void);
*/
static inline void dev_put(struct net_device *dev)
{
this_cpu_dec(*dev->pcpu_refcnt);
if (dev)
this_cpu_dec(*dev->pcpu_refcnt);
}
/**
@ -3685,7 +3686,8 @@ static inline void dev_put(struct net_device *dev)
*/
static inline void dev_hold(struct net_device *dev)
{
this_cpu_inc(*dev->pcpu_refcnt);
if (dev)
this_cpu_inc(*dev->pcpu_refcnt);
}
/* Carrier loss detection, dial on demand. The functions netif_carrier_on