From 1c22d3cda8afa3fffa3875cbfa5c82e818a3f780 Mon Sep 17 00:00:00 2001 From: Luiz Augusto von Dentz Date: Wed, 19 Feb 2020 21:31:55 -0800 Subject: Bluetooth: RFCOMM: Use MTU auto tune logic This reuse the L2CAP MTU auto logic to select the MTU used for RFCOMM channels, this should increase the maximum from 1013 to 1021 when 3-DH5 is supported. Since it does not set an L2CAP MTU we no longer need a debugfs so that is removed. Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Marcel Holtmann --- net/bluetooth/rfcomm/core.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) (limited to 'net/bluetooth') diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c index dcecce087b24..2e20af317cea 100644 --- a/net/bluetooth/rfcomm/core.c +++ b/net/bluetooth/rfcomm/core.c @@ -40,7 +40,6 @@ static bool disable_cfc; static bool l2cap_ertm; static int channel_mtu = -1; -static unsigned int l2cap_mtu = RFCOMM_MAX_L2CAP_MTU; static struct task_struct *rfcomm_thread; @@ -749,7 +748,8 @@ static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, /* Set L2CAP options */ sk = sock->sk; lock_sock(sk); - l2cap_pi(sk)->chan->imtu = l2cap_mtu; + /* Set MTU to 0 so L2CAP can auto select the MTU */ + l2cap_pi(sk)->chan->imtu = 0; l2cap_pi(sk)->chan->sec_level = sec_level; if (l2cap_ertm) l2cap_pi(sk)->chan->mode = L2CAP_MODE_ERTM; @@ -2036,7 +2036,8 @@ static int rfcomm_add_listener(bdaddr_t *ba) /* Set L2CAP options */ sk = sock->sk; lock_sock(sk); - l2cap_pi(sk)->chan->imtu = l2cap_mtu; + /* Set MTU to 0 so L2CAP can auto select the MTU */ + l2cap_pi(sk)->chan->imtu = 0; release_sock(sk); /* Start listening on the socket */ @@ -2234,9 +2235,6 @@ MODULE_PARM_DESC(disable_cfc, "Disable credit based flow control"); module_param(channel_mtu, int, 0644); MODULE_PARM_DESC(channel_mtu, "Default MTU for the RFCOMM channel"); -module_param(l2cap_mtu, uint, 0644); -MODULE_PARM_DESC(l2cap_mtu, "Default MTU for the L2CAP connection"); - module_param(l2cap_ertm, bool, 0644); MODULE_PARM_DESC(l2cap_ertm, "Use L2CAP ERTM mode for connection"); -- cgit v1.2.3