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mpls: small cleanup in inet/inet6_fib_lookup_dev()

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We recently changed this code from returning NULL to returning ERR_PTR.
There are some left over NULL assignments which we can remove.  We can
preserve the error code from ip_route_output() instead of always
returning -ENODEV.  Also these functions use a mix of gotos and direct
returns.  There is no cleanup necessary so I changed the gotos to
direct returns.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Acked-by: Robert Shearman <rshearma@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dan Carpenter 2015-08-04 10:44:22 +03:00 committed by David S. Miller
parent 02b5242847
commit 5a9348b54d
1 changed files with 4 additions and 9 deletions
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13
net/mpls/af_mpls.c
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@ -338,14 +338,14 @@ static unsigned find_free_label(struct net *net)
#if IS_ENABLED(CONFIG_INET)
static struct net_device *inet_fib_lookup_dev(struct net *net, void *addr)
{
struct net_device *dev = NULL;
struct net_device *dev;
struct rtable *rt;
struct in_addr daddr;
memcpy(&daddr, addr, sizeof(struct in_addr));
rt = ip_route_output(net, daddr.s_addr, 0, 0, 0);
if (IS_ERR(rt))
goto errout;
return ERR_CAST(rt);
dev = rt->dst.dev;
dev_hold(dev);
@ -353,8 +353,6 @@ static struct net_device *inet_fib_lookup_dev(struct net *net, void *addr)
ip_rt_put(rt);
return dev;
errout:
return ERR_PTR(-ENODEV);
}
#else
static struct net_device *inet_fib_lookup_dev(struct net *net, void *addr)
@ -366,7 +364,7 @@ static struct net_device *inet_fib_lookup_dev(struct net *net, void *addr)
#if IS_ENABLED(CONFIG_IPV6)
static struct net_device *inet6_fib_lookup_dev(struct net *net, void *addr)
{
struct net_device *dev = NULL;
struct net_device *dev;
struct dst_entry *dst;
struct flowi6 fl6;
int err;
@ -378,16 +376,13 @@ static struct net_device *inet6_fib_lookup_dev(struct net *net, void *addr)
memcpy(&fl6.daddr, addr, sizeof(struct in6_addr));
err = ipv6_stub->ipv6_dst_lookup(net, NULL, &dst, &fl6);
if (err)
goto errout;
return ERR_PTR(err);
dev = dst->dev;
dev_hold(dev);
dst_release(dst);
return dev;
errout:
return ERR_PTR(err);
}
#else
static struct net_device *inet6_fib_lookup_dev(struct net *net, void *addr)