NFC: Move LLCP MIU extension value to socket structure

The MIU extension value can be received during the PAX or during the
connection establishment process. It's definitely a connection related value
rather than a link one.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

4 files changed, 9 insertions, 2 deletions

diff --git a/net/nfc/llcp/commands.c b/net/nfc/llcp/commands.c
index eb51864089ef..850e5cf79378 100644
--- a/net/nfc/llcp/commands.c
+++ b/net/nfc/llcp/commands.c
@@ -183,6 +183,9 @@ int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock,
                 pr_debug("type 0x%x length %d\n", type, length);
 
                 switch (type) {
+                case LLCP_TLV_MIUX:
+                        sock->miu = llcp_tlv_miux(tlv) + 128;
+                        break;
                 case LLCP_TLV_RW:
                         sock->rw = llcp_tlv_rw(tlv);
                         break;
@@ -197,7 +200,7 @@ int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock,
                 tlv += length + 2;
         }
 
-        pr_debug("sock %p rw %d\n", sock, sock->rw);
+        pr_debug("sock %p rw %d miu %d\n", sock, sock->rw, sock->miu);
 
         return 0;
 }
@@ -505,7 +508,7 @@ int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
 
         while (remaining_len > 0) {
 
-                frag_len = min_t(size_t, local->remote_miu, remaining_len);
+                frag_len = min_t(size_t, sock->miu, remaining_len);
 
                 pr_debug("Fragment %zd bytes remaining %zd",
                          frag_len, remaining_len);
diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index d3efc5b3c19f..5f7aa3f632fb 100644
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -655,6 +655,7 @@ static void nfc_llcp_recv_connect(struct nfc_llcp_local *local,
         new_sock = nfc_llcp_sock(new_sk);
         new_sock->dev = local->dev;
         new_sock->local = nfc_llcp_local_get(local);
+        new_sock->miu = local->remote_miu;
         new_sock->nfc_protocol = sock->nfc_protocol;
         new_sock->ssap = sock->ssap;
         new_sock->dsap = ssap;
diff --git a/net/nfc/llcp/llcp.h b/net/nfc/llcp/llcp.h
index add03e74a9ea..7286c86982ff 100644
--- a/net/nfc/llcp/llcp.h
+++ b/net/nfc/llcp/llcp.h
@@ -102,6 +102,7 @@ struct nfc_llcp_sock {
         char *service_name;
         size_t service_name_len;
         u8 rw;
+        u16 miu;
 
         /* Link variables */
         u8 send_n;
diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c
index aab077e68094..30e3cc71be7a 100644
--- a/net/nfc/llcp/sock.c
+++ b/net/nfc/llcp/sock.c
@@ -477,6 +477,7 @@ static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr,
 
         llcp_sock->dev = dev;
         llcp_sock->local = nfc_llcp_local_get(local);
+        llcp_sock->miu = llcp_sock->local->remote_miu;
         llcp_sock->ssap = nfc_llcp_get_local_ssap(local);
         if (llcp_sock->ssap == LLCP_SAP_MAX) {
                 ret = -ENOMEM;
@@ -679,6 +680,7 @@ 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_DEFAULT_RW;
+        llcp_sock->miu = LLCP_DEFAULT_MIU;
         llcp_sock->send_n = llcp_sock->send_ack_n = 0;
         llcp_sock->recv_n = llcp_sock->recv_ack_n = 0;
         llcp_sock->remote_ready = 1;