Messages in this thread Patch in this message | | | From | Zhenguo Zhao <> | Subject | [PATCH v2] tty: n_gsm: delete SABM command frame as requester | Date | Thu, 1 Jul 2021 19:27:20 +0800 |
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From: Zhenguo Zhao <Zhenguo.Zhao1@unisoc.com>
as initiator,it need to send SABM command ,as requester,there is no need to send the SABM control frame,it will cause redundant data.
Signed-off-by: Zhenguo Zhao <Zhenguo.Zhao1@unisoc.com> --- drivers/tty/n_gsm.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 5fea02c..41a6501 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -2997,6 +2997,7 @@ 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); @@ -3005,8 +3006,9 @@ static int gsmtty_open(struct tty_struct *tty, struct file *filp) /* We could in theory open and close before we wait - eg if we get 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); + /* Start sending off SABM messages for initiator */ + 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
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