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>
Signed-off-by: David S. Miller <davem@davemloft.net>
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;
-
- case IPPROTO_UDP:
- check = &(((struct udphdr *)txporthdr)->check);
- break;
-
- default:
- check = NULL;
- break;
- }
+ if (protocol == IPPROTO_UDP)
+ return &((struct udphdr *)txporthdr)->check;
- return check;
+ return NULL;
}
static int