IB/core: Fix endianness annotation in rdma_is_multicast_addr()

[ Upstream commit 1c3aea2bc8f0b2e5b57375ead40457ff75a3a2ec ]

Since ipv4_addr is a big endian 32-bit number, annotate it as such.

Fixes: commit be1d325a3358 ("IB/core: Set RoCEv2 MGID according to spec")
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/rdma/ib_addr.h b/include/rdma/ib_addr.h
index 8815989..b2a10c7 100644 (file)
--- a/include/rdma/ib_addr.h
+++ b/include/rdma/ib_addr.h
@@ -306,12 +306,12 @@ static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
 
 static inline int rdma_is_multicast_addr(struct in6_addr *addr)
 {
-       u32 ipv4_addr;
+       __be32 ipv4_addr;
 
        if (addr->s6_addr[0] == 0xff)
                return 1;
 
-       memcpy(&ipv4_addr, addr->s6_addr + 12, 4);
+       ipv4_addr = addr->s6_addr32[3];
        return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr));
 }