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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: Yajun Deng <yajun.deng@linux.dev> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -4143,12 +4143,14 @@ void netdev_run_todo(void);
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*/
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*/
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static inline void dev_put(struct net_device *dev)
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static inline void dev_put(struct net_device *dev)
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{
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{
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if (dev) {
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#ifdef CONFIG_PCPU_DEV_REFCNT
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#ifdef CONFIG_PCPU_DEV_REFCNT
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this_cpu_dec(*dev->pcpu_refcnt);
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this_cpu_dec(*dev->pcpu_refcnt);
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#else
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#else
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refcount_dec(&dev->dev_refcnt);
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refcount_dec(&dev->dev_refcnt);
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#endif
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#endif
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}
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}
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}
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/**
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/**
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* dev_hold - get reference to device
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* dev_hold - get reference to device
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@ -4158,12 +4160,14 @@ static inline void dev_put(struct net_device *dev)
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*/
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*/
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static inline void dev_hold(struct net_device *dev)
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static inline void dev_hold(struct net_device *dev)
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{
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{
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if (dev) {
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#ifdef CONFIG_PCPU_DEV_REFCNT
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#ifdef CONFIG_PCPU_DEV_REFCNT
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this_cpu_inc(*dev->pcpu_refcnt);
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this_cpu_inc(*dev->pcpu_refcnt);
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#else
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#else
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refcount_inc(&dev->dev_refcnt);
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refcount_inc(&dev->dev_refcnt);
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#endif
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#endif
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}
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}
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}
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/* Carrier loss detection, dial on demand. The functions netif_carrier_on
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/* Carrier loss detection, dial on demand. The functions netif_carrier_on
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* and _off may be called from IRQ context, but it is caller
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* and _off may be called from IRQ context, but it is caller
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