1 files changed, 13 insertions, 5 deletions

diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c
index 6de33fe7bf5b..fe18dc2dd3c1 100644
--- a/net/bluetooth/rfcomm/core.c
+++ b/net/bluetooth/rfcomm/core.c
@@ -52,8 +52,9 @@
 #define BT_DBG(D...)
 #endif
 
-#define VERSION "1.7"
+#define VERSION "1.8"
 
+static int disable_cfc = 0;
 static unsigned int l2cap_mtu = RFCOMM_MAX_L2CAP_MTU;
 
 static struct task_struct *rfcomm_thread;
@@ -533,7 +534,7 @@ static struct rfcomm_session *rfcomm_session_add(struct socket *sock, int state)
         s->sock  = sock;
 
         s->mtu = RFCOMM_DEFAULT_MTU;
-        s->cfc = RFCOMM_CFC_UNKNOWN;
+        s->cfc = disable_cfc ? RFCOMM_CFC_DISABLED : RFCOMM_CFC_UNKNOWN;
 
         /* Do not increment module usage count for listening sessions.
          * Otherwise we won't be able to unload the module. */
@@ -1222,14 +1223,18 @@ static int rfcomm_apply_pn(struct rfcomm_dlc *d, int cr, struct rfcomm_pn *pn)
         BT_DBG("dlc %p state %ld dlci %d mtu %d fc 0x%x credits %d", 
                         d, d->state, d->dlci, pn->mtu, pn->flow_ctrl, pn->credits);
 
-        if (pn->flow_ctrl == 0xf0 || pn->flow_ctrl == 0xe0) {
-                d->cfc = s->cfc = RFCOMM_CFC_ENABLED;
+        if ((pn->flow_ctrl == 0xf0 && s->cfc != RFCOMM_CFC_DISABLED) ||
+                                                pn->flow_ctrl == 0xe0) {
+                d->cfc = RFCOMM_CFC_ENABLED;
                 d->tx_credits = pn->credits;
         } else {
-                d->cfc = s->cfc = RFCOMM_CFC_DISABLED;
+                d->cfc = RFCOMM_CFC_DISABLED;
                 set_bit(RFCOMM_TX_THROTTLED, &d->flags);
         }
 
+        if (s->cfc == RFCOMM_CFC_UNKNOWN)
+                s->cfc = d->cfc;
+
         d->priority = pn->priority;
 
         d->mtu = s->mtu = btohs(pn->mtu);
@@ -2073,6 +2078,9 @@ static void __exit rfcomm_exit(void)
 module_init(rfcomm_init);
 module_exit(rfcomm_exit);
 
+module_param(disable_cfc, bool, 0644);
+MODULE_PARM_DESC(disable_cfc, "Disable credit based flow control");
+
 module_param(l2cap_mtu, uint, 0644);
 MODULE_PARM_DESC(l2cap_mtu, "Default MTU for the L2CAP connection");