net: dev: Use unsigned integer as an argument to left-shift

[ Upstream commit f4d7b3e23d259c44f1f1c39645450680fcd935d6 ]

1 << 31 is Undefined Behaviour according to the C standard.
Use U type modifier to avoid theoretical overflow.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 8c2fec0..5ada5fd 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3790,7 +3790,7 @@ static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
        if (debug_value == 0)   /* no output */
                return 0;
        /* set low N bits */
-       return (1 << debug_value) - 1;
+       return (1U << debug_value) - 1;
 }
 
 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)