Messages in this thread Patch in this message | | | From | Zhenguo Zhao <> | Subject | [PATCH 6/8] tty: n_gsm: Delete gsmtty open SABM frame when config requester | Date | Fri, 20 Aug 2021 20:17:50 +0800 |
| |
From: Zhenguo Zhao <Zhenguo.Zhao1@unisoc.com>
When n_gsm config "initiator=0",as requester ,it doesn't need to send SABM frame data during gsmtty open.
Example,when gsmtty open,it will send SABM frame.for initiator,it maybe not want to receive the frame.
[ 88.410426] c1 gsmld_output: 00000000: f9 07 3f 01 de f9 [ 88.420839] c1 --> 1) R: SABM(F)
Signed-off-by: Zhenguo Zhao <Zhenguo.Zhao1@unisoc.com> --- drivers/tty/n_gsm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 9ded99a..8d56d3d 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -3001,6 +3001,7 @@ static int gsmtty_open(struct tty_struct *tty, struct file *filp) { struct gsm_dlci *dlci = tty->driver_data; struct tty_port *port = &dlci->port; + struct gsm_mux *gsm = dlci->gsm; port->count++; tty_port_tty_set(port, tty); @@ -3010,7 +3011,8 @@ static int gsmtty_open(struct tty_struct *tty, struct file *filp) a DM straight back. This is ok as that will have caused a hangup */ tty_port_set_initialized(port, 1); /* Start sending off SABM messages */ - gsm_dlci_begin_open(dlci); + if (gsm->initiator) + gsm_dlci_begin_open(dlci); /* And wait for virtual carrier */ return tty_port_block_til_ready(port, tty, filp); } -- 1.9.1
| |