[PATCH net-next 4/8] net: qualcomm: rmnet: simplify rmnet_map_get_csum_field()

[Alex Elder <elder@linaro.org>]

The checksum fields of the TCP and UDP header structures already
have type __sum16.  We don't support any other protocol headers, so
we can simplify rmnet_map_get_csum_field(), getting rid of the local
variable entirely and just returning the appropriate address.

Signed-off-by: Alex Elder <elder@linaro.org>
---
 .../ethernet/qualcomm/rmnet/rmnet_map_data.c  | 20 +++++--------------
 1 file changed, 5 insertions(+), 15 deletions(-)

diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c
index ca07b87d7ed71..79f1d516b5cca 100644
--- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c
+++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c
@@ -19,23 +19,13 @@
 static __sum16 *rmnet_map_get_csum_field(unsigned char protocol,
 					 const void *txporthdr)
 {
-	__sum16 *check = NULL;
+	if (protocol == IPPROTO_TCP)
+		return &((struct tcphdr *)txporthdr)->check;
 
-	switch (protocol) {
-	case IPPROTO_TCP:
-		check = &(((struct tcphdr *)txporthdr)->check);
-		break;
+	if (protocol == IPPROTO_UDP)
+		return &((struct udphdr *)txporthdr)->check;
 
-	case IPPROTO_UDP:
-		check = &(((struct udphdr *)txporthdr)->check);
-		break;
-
-	default:
-		check = NULL;
-		break;
-	}
-
-	return check;
+	return NULL;
 }
 
 static int
-- 
2.27.0