From: Bart Van Assche <bart.vanassche@wdc.com>
Date: Wed, 11 Oct 2017 17:48:43 +0000 (-0700)
Subject: IB/core: Fix endianness annotation in rdma_is_multicast_addr()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9fc290e529b4948b2b18fa943d8bd5c3a5d5b6e1;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

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 8815989301ab..b2a10c762304 100644
--- 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));
 }