Commit b37a4668 authored by Yajun Deng's avatar Yajun Deng Committed by David S. Miller
Browse files

netdevice: add the case if dev is NULL 



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: default avatarYajun Deng <yajun.deng@linux.dev>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1160dfa1

include/linux/netdevice.h

+8 −4
Original line number Diff line number Diff line
@@ -4143,12 +4143,14 @@ void netdev_run_todo(void); 
 */

static inline void dev_put(struct net_device *dev)

{

	if (dev) {

#ifdef CONFIG_PCPU_DEV_REFCNT

		this_cpu_dec(*dev->pcpu_refcnt);

#else

		refcount_dec(&dev->dev_refcnt);

#endif

	}

}



/**

 *	dev_hold - get reference to device
@@ -4158,12 +4160,14 @@ static inline void dev_put(struct net_device *dev) 
 */

static inline void dev_hold(struct net_device *dev)

{

	if (dev) {

#ifdef CONFIG_PCPU_DEV_REFCNT

		this_cpu_inc(*dev->pcpu_refcnt);

#else

		refcount_inc(&dev->dev_refcnt);

#endif

	}

}



/* Carrier loss detection, dial on demand. The functions netif_carrier_on

 * and _off may be called from IRQ context, but it is caller