[PATCH net] net: ipmr: ipmr_get_table() returns NULL

[Dan Carpenter]

The ipmr_get_table() function doesn't return error pointers it returns
NULL on error.

Fixes: 4f75ba6982bc ("net: ipmr: Add ipmr_rtm_getroute")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index bb909f1d7537..06863ea3fc5b 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -2431,8 +2431,8 @@ static int ipmr_rtm_getroute(struct sk_buff *in_skb, 
struct nlmsghdr *nlh,
        tableid = tb[RTA_TABLE] ? nla_get_u32(tb[RTA_TABLE]) : 0;
 
        mrt = ipmr_get_table(net, tableid ? tableid : RT_TABLE_DEFAULT);
-       if (IS_ERR(mrt)) {
-               err = PTR_ERR(mrt);
+       if (!mrt) {
+               err = -ENOENT;
                goto errout_free;
        }