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>

3 files changed, 9 insertions, 6 deletions

diff --git a/net/nfc/llcp/commands.c b/net/nfc/llcp/commands.c
index b75a9b3f9e89..c5535cc9ed3a 100644
--- a/net/nfc/llcp/commands.c
+++ b/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,
diff --git a/net/nfc/llcp/llcp.h b/net/nfc/llcp/llcp.h
index 7e87a66b02ec..53054d337bf9 100644
--- a/net/nfc/llcp/llcp.h
+++ b/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 */
diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c
index 6fa76704cb13..873c837e5c97 100644
--- a/net/nfc/llcp/sock.c
+++ b/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;