tun: fix build warnings
authorJason Wang <jasowang@redhat.com>
Mon, 4 Jul 2016 05:53:38 +0000 (13:53 +0800)
committerDavid S. Miller <davem@davemloft.net>
Tue, 5 Jul 2016 00:19:27 +0000 (17:19 -0700)
commitf48cc6b2661ccb6e9d85a5cdd78c0150929a2821
tree30ff3deff4a6bfbd17dfaafde2a0899373939b68
parent22f8788388814cdb2f700086a6ffe94aacb3612c
tun: fix build warnings

Stephen Rothwell reports a build warnings(powerpc ppc64_defconfig)

drivers/net/tun.c: In function 'tun_do_read.part.5':
/home/sfr/next/next/drivers/net/tun.c:1491:6: warning: 'err' may be
used uninitialized in this function [-Wmaybe-uninitialized]
   int err;

This is because tun_ring_recv() may return an uninitialized err, fix this.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/tun.c