From 8c5b83f0f255542b40a1273c32eb067ec00bb2b2 Mon Sep 17 00:00:00 2001 From: Roopa Prabhu Date: Sat, 10 Oct 2015 08:26:36 -0700 Subject: [PATCH] ipv6 route: use err pointers instead of returning pointer by reference This patch makes ip6_route_info_create return err pointer instead of returning the rt pointer by reference as suggested by Dave Signed-off-by: Roopa Prabhu Signed-off-by: David S. Miller --- net/ipv6/route.c | 32 +++++++++++++++++--------------- 1 file changed, 17 insertions(+), 15 deletions(-) diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 4320ddcac33f..db5b54ad5912 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -1724,21 +1724,21 @@ static int ip6_convert_metrics(struct mx6_config *mxc, return -EINVAL; } -int ip6_route_info_create(struct fib6_config *cfg, struct rt6_info **rt_ret) +static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg) { - int err; struct net *net = cfg->fc_nlinfo.nl_net; struct rt6_info *rt = NULL; struct net_device *dev = NULL; struct inet6_dev *idev = NULL; struct fib6_table *table; int addr_type; + int err = -EINVAL; if (cfg->fc_dst_len > 128 || cfg->fc_src_len > 128) - return -EINVAL; + goto out; #ifndef CONFIG_IPV6_SUBTREES if (cfg->fc_src_len) - return -EINVAL; + goto out; #endif if (cfg->fc_ifindex) { err = -ENODEV; @@ -1958,9 +1958,7 @@ install_route: cfg->fc_nlinfo.nl_net = dev_net(dev); - *rt_ret = rt; - - return 0; + return rt; out: if (dev) dev_put(dev); @@ -1969,20 +1967,21 @@ out: if (rt) dst_free(&rt->dst); - *rt_ret = NULL; - - return err; + return ERR_PTR(err); } int ip6_route_add(struct fib6_config *cfg) { struct mx6_config mxc = { .mx = NULL, }; - struct rt6_info *rt = NULL; + struct rt6_info *rt; int err; - err = ip6_route_info_create(cfg, &rt); - if (err) + rt = ip6_route_info_create(cfg); + if (IS_ERR(rt)) { + err = PTR_ERR(rt); + rt = NULL; goto out; + } err = ip6_convert_metrics(&mxc, cfg); if (err) @@ -2871,9 +2870,12 @@ static int ip6_route_multipath_add(struct fib6_config *cfg) r_cfg.fc_encap_type = nla_get_u16(nla); } - err = ip6_route_info_create(&r_cfg, &rt); - if (err) + rt = ip6_route_info_create(&r_cfg); + if (IS_ERR(rt)) { + err = PTR_ERR(rt); + rt = NULL; goto cleanup; + } err = ip6_route_info_append(&rt6_nh_list, rt, &r_cfg); if (err) { -- 2.39.5