diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2016-10-04 09:22:19 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2016-10-04 09:46:44 +0200 |
| commit | 1e1430d5282bc3a572465ef3261eea793d98a653 (patch) | |
| tree | 81c8883606ed2dd821f4509581888505d48631dd /net/ipv4/route.c | |
| parent | bb42f2d13ffcd0baed7547b37d05add51fcd50e1 (diff) | |
| parent | 9a8dd213d2a38349e5ea2ca8888400952112b45c (diff) | |
Merge remote-tracking branch 'net-next/master' into mac80211-next
Resolve the merge conflict between Felix's/my and Toke's patches
coming into the tree through net and mac80211-next respectively.
Most of Felix's changes go away due to Toke's new infrastructure
work, my patch changes to "goto begin" (the label wasn't there
before) instead of returning NULL so flow control towards drivers
is preserved better.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/ipv4/route.c')
| -rw-r--r-- | net/ipv4/route.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index b52496fd5107..f2be689a6c85 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -476,12 +476,18 @@ u32 ip_idents_reserve(u32 hash, int segs) atomic_t *p_id = ip_idents + hash % IP_IDENTS_SZ; u32 old = ACCESS_ONCE(*p_tstamp); u32 now = (u32)jiffies; - u32 delta = 0; + u32 new, delta = 0; if (old != now && cmpxchg(p_tstamp, old, now) == old) delta = prandom_u32_max(now - old); - return atomic_add_return(segs + delta, p_id) - segs; + /* Do not use atomic_add_return() as it makes UBSAN unhappy */ + do { + old = (u32)atomic_read(p_id); + new = old + delta + segs; + } while (atomic_cmpxchg(p_id, old, new) != old); + + return new - segs; } EXPORT_SYMBOL(ip_idents_reserve); @@ -2494,7 +2500,8 @@ static int rt_fill_info(struct net *net, __be32 dst, __be32 src, u32 table_id, IPV4_DEVCONF_ALL(net, MC_FORWARDING)) { int err = ipmr_get_route(net, skb, fl4->saddr, fl4->daddr, - r, nowait); + r, nowait, portid); + if (err <= 0) { if (!nowait) { if (err == 0) |