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Subject[PATCH 4.4 189/312] ipv4: fix checksum annotation in udp4_csum_init
Date
From: Hannes Frederic Sowa <hannes@stressinduktion.org>

commit b46d9f625b07f843c706c2c7d0210a90ccdf143b upstream.

Reported-by: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Tom Herbert <tom@herbertland.com>
Fixes: 4068579e1e098fa ("net: Implmement RFC 6936 (zero RX csums for UDP/IPv6")
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
net/ipv4/udp.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1754,8 +1754,11 @@ static inline int udp4_csum_init(struct
}
}

- return skb_checksum_init_zero_check(skb, proto, uh->check,
- inet_compute_pseudo);
+ /* Note, we are only interested in != 0 or == 0, thus the
+ * force to int.
+ */
+ return (__force int)skb_checksum_init_zero_check(skb, proto, uh->check,
+ inet_compute_pseudo);
}

/*

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