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libcxgb: fix error check for ip6_route_output()

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[ Upstream commit a9a8cdb368d99bb655b5cdabea560446db0527cc ]

ip6_route_output() never returns NULL so
check dst->error instead of !dst.

Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Varun Prakash 2017-01-03 21:25:48 +05:30 committed by Greg Kroah-Hartman
parent 5eb97be879
commit 30bd002c45
1 changed files with 5 additions and 7 deletions
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12
drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.c
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@ -133,17 +133,15 @@ cxgb_find_route6(struct cxgb4_lld_info *lldi,
if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
fl6.flowi6_oif = sin6_scope_id;
dst = ip6_route_output(&init_net, NULL, &fl6);
if (!dst)
goto out;
if (!cxgb_our_interface(lldi, get_real_dev,
ip6_dst_idev(dst)->dev) &&
!(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
if (dst->error ||
(!cxgb_our_interface(lldi, get_real_dev,
ip6_dst_idev(dst)->dev) &&
!(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK))) {
dst_release(dst);
dst = NULL;
return NULL;
}
}
out:
return dst;
}
EXPORT_SYMBOL(cxgb_find_route6);