NFC: Forbid SSAP binding to a not well known LLCP service

With not Well Known Services there is no guarantees as to which
SSAP the server will be listening on, so there is no reason to
support binding to a specific source SAP.

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

1 files changed, 5 insertions, 17 deletions

diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index 1031abd13fc2..9ab17ec50ce7 100644
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -234,24 +234,12 @@ u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local,
 
                 return LLCP_WKS_NUM_SAP + ssap;
 
-        } else if (sock->ssap != 0) {
-                if (sock->ssap < LLCP_WKS_NUM_SAP) {
-                        if (!test_bit(sock->ssap, &local->local_wks)) {
-                                set_bit(sock->ssap, &local->local_wks);
-                                mutex_unlock(&local->sdp_lock);
-
-                                return sock->ssap;
-                        }
-
-                } else if (sock->ssap < LLCP_SDP_NUM_SAP) {
-                        if (!test_bit(sock->ssap - LLCP_WKS_NUM_SAP,
-                                      &local->local_sdp)) {
-                                set_bit(sock->ssap - LLCP_WKS_NUM_SAP,
-                                        &local->local_sdp);
-                                mutex_unlock(&local->sdp_lock);
+        } else if (sock->ssap != 0 && sock->ssap < LLCP_WKS_NUM_SAP) {
+                if (!test_bit(sock->ssap, &local->local_wks)) {
+                        set_bit(sock->ssap, &local->local_wks);
+                        mutex_unlock(&local->sdp_lock);
 
-                                return sock->ssap;
-                        }
+                        return sock->ssap;
                 }
         }