diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/n_gsm.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index ed429082304d..8d7766bfef87 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -2003,6 +2003,7 @@ void gsm_cleanup_mux(struct gsm_mux *gsm) int i; struct gsm_dlci *dlci = gsm->dlci[0]; struct gsm_msg *txq; + struct gsm_control *gc; gsm->dead = 1; @@ -2016,6 +2017,13 @@ void gsm_cleanup_mux(struct gsm_mux *gsm) spin_unlock(&gsm_mux_lock); WARN_ON(i == MAX_MUX); + /* In theory disconnecting DLCI 0 is sufficient but for some + modems this is apparently not the case. */ + if (dlci) { + gc = gsm_control_send(gsm, CMD_CLD, NULL, 0); + if (gc) + gsm_control_wait(gsm, gc); + } del_timer_sync(&gsm->t2_timer); /* Now we are sure T2 has stopped */ if (dlci) { |