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Commit f17141fd authored by Alan Cox's avatar Alan Cox Committed by Greg Kroah-Hartman
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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: default avatarAlan Cox <alan@linux.intel.com>
Tested-by: Michael Lauer
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent a4c9fe8d

drivers/tty/n_gsm.c

+8 −0
Original line number Diff line number Diff line
@@ -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) {