Messages in this thread Patch in this message | | | From | Zhenguo Zhao <> | Subject | [PATCH v4] tty: n_gsm: delete DISC command frame as requester | Date | Mon, 5 Jul 2021 19:59:42 +0800 |
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From: Zhenguo Zhao <Zhenguo.Zhao1@unisoc.com>
as initiator,it need to send DISC command ,as requester,there is no need to send the DISC control frame,it will cause redundant data.
Signed-off-by: Zhenguo Zhao <Zhenguo.Zhao1@unisoc.com> --- drivers/tty/n_gsm.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 5fea02c..ea9c750 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -2050,7 +2050,8 @@ static int gsm_disconnect(struct gsm_mux *gsm) del_timer_sync(&gsm->t2_timer); /* Now we are sure T2 has stopped */ - gsm_dlci_begin_close(dlci); + if (gsm->initiator) + gsm_dlci_begin_close(dlci); wait_event_interruptible(gsm->event, dlci->state == DLCI_CLOSED); @@ -3024,7 +3025,8 @@ static void gsmtty_close(struct tty_struct *tty, struct file *filp) mutex_unlock(&dlci->mutex); if (tty_port_close_start(&dlci->port, tty, filp) == 0) return; - gsm_dlci_begin_close(dlci); + if (dlci->gsm->initiator) + gsm_dlci_begin_close(dlci); if (tty_port_initialized(&dlci->port) && C_HUPCL(tty)) tty_port_lower_dtr_rts(&dlci->port); tty_port_close_end(&dlci->port, tty); @@ -3035,10 +3037,12 @@ static void gsmtty_close(struct tty_struct *tty, struct file *filp) static void gsmtty_hangup(struct tty_struct *tty) { struct gsm_dlci *dlci = tty->driver_data; + struct gsm_mux *gsm = dlci->gsm; if (dlci->state == DLCI_CLOSED) return; tty_port_hangup(&dlci->port); - gsm_dlci_begin_close(dlci); + if (gsm->initiator) + gsm_dlci_begin_close(dlci); } static int gsmtty_write(struct tty_struct *tty, const unsigned char *buf, -- 1.9.1
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