[PATCH] RDMA CM: Correct detection of SA Created MGID

[Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>]

RDMA CM treats AF_INET6 addresses that are either 0 or prefixed with
FF1x:A01B::/32 as MGIDs, but the detection for the prefix was buggy,
fix it up.

Signed-off-by: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
---
 drivers/infiniband/core/cma.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

Sean: Sounded like you agree?

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 1e9a78a..a1041b2 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -2720,7 +2720,7 @@ static void cma_set_mgid(struct rdma_id_private *id_priv,
 	if (cma_any_addr(addr)) {
 		memset(mgid, 0, sizeof *mgid);
 	} else if ((addr->sa_family == AF_INET6) &&
-		   ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFF10A01B) ==
+		   ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
 								 0xFF10A01B)) {
 		/* IPv6 address is an SA assigned MGID. */
 		memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
-- 
1.5.4.2

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