misc: Fix panic on suspend in TS27.010 Mux driver

Change-Id: I6af85425934961c65caf096f501f2356eac946fd
Signed-off-by: Benoit Goby <benoit@android.com>

diff --git a/drivers/misc/ts27010mux/ts27010_ldisc.c b/drivers/misc/ts27010mux/ts27010_ldisc.c
index 3a9be8d63dbaf85a9f2151d64e443ec07332e85c..586a5183eabaec2d70639ab44c873fa09027717c 100644 (file)
--- a/drivers/misc/ts27010mux/ts27010_ldisc.c
+++ b/drivers/misc/ts27010mux/ts27010_ldisc.c
@@ -96,6 +96,10 @@ static void ts27010_ldisc_close(struct tty_struct *tty)
 {
        struct ts27010_ldisc_data *ts = tty->disc_data;
 
+       if (!ts)
+               return;
+
+       tty->disc_data = NULL;
        /* TODO: goes away with clean tty interface */
        ts27010mux_tty = NULL;
        /* TODO: find some way of dealing with ts_data freeing safely */