X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=drivers%2Ftty%2Fn_gsm.c;h=0ee7531c92017557c6e529448ddd63caf1a7a9fe;hb=refs%2Fheads%2Ftizen-6.6.y;hp=1f3aba607cd51dcc389d1c9ad723643e476e7d13;hpb=5e8a5e895a20c08acc49736c3ce0898be4c77c91;p=platform%2Fkernel%2Flinux-starfive.git

diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 1f3aba6..0ee7531 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -4108,6 +4108,8 @@ static int gsm_modem_upd_via_msc(struct gsm_dlci *dlci, u8 brk)
 
 static int gsm_modem_update(struct gsm_dlci *dlci, u8 brk)
 {
+	if (dlci->gsm->dead)
+		return -EL2HLT;
 	if (dlci->adaption == 2) {
 		/* Send convergence layer type 2 empty data frame. */
 		gsm_modem_upd_via_data(dlci, brk);