netdevice: add the case if dev is NULL

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>

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 7972aac9264c00abce2893777be607075d69ccc5..1edc2af51e038d709207b7b0b50ec1279962026f 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3378,7 +3378,8 @@ 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);
 }
 
 /**
@@ -3389,7 +3390,8 @@ 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