NFC: llcp: Socket miux is a big endian field

The MIUX must be transmitted in big endian and as such we have to convert
it properly.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

net/nfc/llcp/commands.c

@@ -420,7 +420,8 @@ int nfc_llcp_send_connect(struct nfc_llcp_sock *sock)
 	}
 
 	/* If the socket parameters are not set, use the local ones */
-	miux = sock->miux > LLCP_MAX_MIUX ? local->miux : sock->miux;
+	miux = be16_to_cpu(sock->miux) > LLCP_MAX_MIUX ?
+		local->miux : sock->miux;
 	rw = sock->rw > LLCP_MAX_RW ? local->rw : sock->rw;
 
 	miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,
@@ -475,7 +476,8 @@ int nfc_llcp_send_cc(struct nfc_llcp_sock *sock)
 		return -ENODEV;
 
 	/* If the socket parameters are not set, use the local ones */
-	miux = sock->miux > LLCP_MAX_MIUX ? local->miux : sock->miux;
+	miux = be16_to_cpu(sock->miux) > LLCP_MAX_MIUX ?
+		local->miux : sock->miux;
 	rw = sock->rw > LLCP_MAX_RW ? local->rw : sock->rw;
 
 	miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,

net/nfc/llcp/llcp.h

@@ -124,7 +124,7 @@ struct nfc_llcp_sock {
 	char *service_name;
 	size_t service_name_len;
 	u8 rw;
-	u16 miux;
+	__be16 miux;
 
 
 	/* Remote link parameters */

net/nfc/llcp/sock.c

@@ -279,7 +279,7 @@ static int nfc_llcp_setsockopt(struct socket *sock, int level, int optname,
 			break;
 		}
 
-		llcp_sock->miux = (u16) opt;
+		llcp_sock->miux = cpu_to_be16((u16) opt);
 
 		break;
 
@@ -323,7 +323,8 @@ static int nfc_llcp_getsockopt(struct socket *sock, int level, int optname,
 		break;
 
 	case NFC_LLCP_MIUX:
-		if (put_user(llcp_sock->miux, (u32 __user *) optval))
+		if (put_user(be16_to_cpu(llcp_sock->miux),
+			     (u32 __user *) optval))
 			err = -EFAULT;
 
 		break;
@@ -921,7 +922,7 @@ struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp)
 	llcp_sock->ssap = 0;
 	llcp_sock->dsap = LLCP_SAP_SDP;
 	llcp_sock->rw = LLCP_MAX_RW + 1;
-	llcp_sock->miux = LLCP_MAX_MIUX + 1;
+	llcp_sock->miux = cpu_to_be16(LLCP_MAX_MIUX + 1);
 	llcp_sock->remote_rw = LLCP_DEFAULT_RW;
 	llcp_sock->remote_miu = LLCP_DEFAULT_MIU;
 	llcp_sock->send_n = llcp_sock->send_ack_n = 0;