[PATCH net-next] macvlan: Mark expected switch fall-through

From: Gustavo A. R. Silva
Date: Mon May 20 2019 - 10:47:57 EST


In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warning:

drivers/net/macvlan.c: In function âmacvlan_do_ioctlâ:
drivers/net/macvlan.c:839:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
if (!net_eq(dev_net(dev), &init_net))
^
drivers/net/macvlan.c:841:2: note: here
case SIOCGHWTSTAMP:
^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
---
drivers/net/macvlan.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 92efa93649f0..61550122b563 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -838,6 +838,7 @@ static int macvlan_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
case SIOCSHWTSTAMP:
if (!net_eq(dev_net(dev), &init_net))
break;
+ /* fall through */
case SIOCGHWTSTAMP:
if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
--
2.21.0