[DCCP]: Collapse repeated `len' statements into one

This replaces 4 individual assignments for `len' with a single
one, placed where the control flow of those 4 leads to.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/dccp/proto.c

@@ -657,19 +657,15 @@ static int do_dccp_getsockopt(struct sock *sk, int level, int optname,
 					       (__be32 __user *)optval, optlen);
 	case DCCP_SOCKOPT_GET_CUR_MPS:
 		val = dp->dccps_mss_cache;
-		len = sizeof(val);
 		break;
 	case DCCP_SOCKOPT_SERVER_TIMEWAIT:
 		val = dp->dccps_server_timewait;
-		len = sizeof(val);
 		break;
 	case DCCP_SOCKOPT_SEND_CSCOV:
 		val = dp->dccps_pcslen;
-		len = sizeof(val);
 		break;
 	case DCCP_SOCKOPT_RECV_CSCOV:
 		val = dp->dccps_pcrlen;
-		len = sizeof(val);
 		break;
 	case 128 ... 191:
 		return ccid_hc_rx_getsockopt(dp->dccps_hc_rx_ccid, sk, optname,
@@ -681,6 +677,7 @@ static int do_dccp_getsockopt(struct sock *sk, int level, int optname,
 		return -ENOPROTOOPT;
 	}
 
+	len = sizeof(val);
 	if (put_user(len, optlen) || copy_to_user(optval, &val, len))
 		return -EFAULT;