diff options
| author | Alan Cox | 2011-08-26 11:28:11 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2011-08-26 11:01:14 -0700 |
| commit | f17141fdd407de78379222dd59d6f161437db4c8 (patch) | |
| tree | 109e62b0085f745f9dd0710b1d746ace2ada53b5 /drivers/tty/n_gsm.c | |
| parent | a4c9fe8daf88b27f81be8022d49c073d37fe645e (diff) | |
n_gsm: Send CLD command on exit
A DISC on DLCI 0 should close down the mux but Michael Lauer reports this
is not the case for some modems. Send a CLD as well.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Tested-by: Michael Lauer
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/tty/n_gsm.c')
| -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) { |