netdev - [PATCH net-next] secure_seq: fix sparse errors

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Date:   Wed, 11 Jan 2017 18:10:37 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     David Miller <davem@...emloft.net>
Cc:     netdev <netdev@...r.kernel.org>,
        "Jason A. Donenfeld" <Jason@...c4.com>
Subject: [PATCH net-next] secure_seq: fix sparse errors

From: Eric Dumazet <edumazet@...gle.com>

Fixes following warnings :

net/core/secure_seq.c:125:28: warning: incorrect type in argument 1
(different base types)
net/core/secure_seq.c:125:28:    expected unsigned int const [unsigned]
[usertype] a
net/core/secure_seq.c:125:28:    got restricted __be32 [usertype] saddr
net/core/secure_seq.c:125:35: warning: incorrect type in argument 2
(different base types)
net/core/secure_seq.c:125:35:    expected unsigned int const [unsigned]
[usertype] b
net/core/secure_seq.c:125:35:    got restricted __be32 [usertype] daddr
net/core/secure_seq.c:125:43: warning: cast from restricted __be16
net/core/secure_seq.c:125:61: warning: restricted __be16 degrades to
integer


Fixes: 7cd23e5300c1 ("secure_seq: use SipHash in place of MD5")
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 net/core/secure_seq.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/core/secure_seq.c b/net/core/secure_seq.c
index 3a9fcec94ace21238c0d6cd6d9997678e0623ab9..758f140b6bedc51669fed973b39ee317c2bf1570 100644
--- a/net/core/secure_seq.c
+++ b/net/core/secure_seq.c
@@ -122,7 +122,9 @@ u64 secure_dccp_sequence_number(__be32 saddr, __be32 daddr,
 {
 	u64 seq;
 	net_secret_init();
-	seq = siphash_3u32(saddr, daddr, (u32)sport << 16 | dport, &net_secret);
+	seq = siphash_3u32((__force u32)saddr, (__force u32)daddr,
+			   (__force u32)sport << 16 | (__force u32)dport,
+			   &net_secret);
 	seq += ktime_get_real_ns();
 	seq &= (1ull << 48) - 1;
 	return seq;