diff options
Diffstat (limited to 'drivers/char/moxa.c')
| -rw-r--r-- | drivers/char/moxa.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c index 1ab9517c24c5..585fac179ec6 100644 --- a/drivers/char/moxa.c +++ b/drivers/char/moxa.c @@ -1280,6 +1280,7 @@ static int moxa_chars_in_buffer(struct tty_struct *tty) */ if (ch == NULL) return 0; + lock_kernel(); chars = MoxaPortTxQueue(ch); if (chars) { /* @@ -1289,6 +1290,7 @@ static int moxa_chars_in_buffer(struct tty_struct *tty) if (!(ch->statusflags & EMPTYWAIT)) moxa_setup_empty_event(tty); } + unlock_kernel(); return chars; } |