[PATCH -next] dh key: convert to use be32_add_cpu()

[Liu Shixin]

Convert cpu_to_be32(be32_to_cpu(E1) + E2) to use be32_add_cpu().

Signed-off-by: Liu Shixin <liushixin2@xxxxxxxxxx>
---
 security/keys/dh.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/keys/dh.c b/security/keys/dh.c
index 1abfa70ed6e1..2635cb8a4561 100644
--- a/security/keys/dh.c
+++ b/security/keys/dh.c
@@ -186,7 +186,7 @@ static int kdf_ctr(struct kdf_sdesc *sdesc, const u8 *src, unsigned int slen,
 
 		dlen -= h;
 		dst += h;
-		counter = cpu_to_be32(be32_to_cpu(counter) + 1);
+		be32_add_cpu(&counter, 1);
 	}
 
 	return 0;
-- 
2.25.1