ipv4: Get the address of interface correctly.

When using ioctl to get address of interface, we can't
get it anymore. For example, the command is show as below.

	# ifconfig eth0

In the patch ("03aef17bb79b3"), the devinet_ioctl does not
return a suitable value, even though we can find it in
the kernel. Then fix it now.

Fixes: 03aef17bb79b3 ("devinet_ioctl(): take copyin/copyout to caller")
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index e056c0067f2c..40f001782c1b 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1048,18 +1048,22 @@ int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr)
 
         switch (cmd) {
         case SIOCGIFADDR:       /* Get interface address */
+                ret = 0;
                 sin->sin_addr.s_addr = ifa->ifa_local;
                 break;
 
         case SIOCGIFBRDADDR:    /* Get the broadcast address */
+                ret = 0;
                 sin->sin_addr.s_addr = ifa->ifa_broadcast;
                 break;
 
         case SIOCGIFDSTADDR:    /* Get the destination address */
+                ret = 0;
                 sin->sin_addr.s_addr = ifa->ifa_address;
                 break;
 
         case SIOCGIFNETMASK:    /* Get the netmask for the interface */
+                ret = 0;
                 sin->sin_addr.s_addr = ifa->ifa_mask;
                 break;