diff options
Diffstat (limited to 'drivers/staging/greybus/uart.c')
| -rw-r--r-- | drivers/staging/greybus/uart.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c index 6260569b2f25..80896385c1cb 100644 --- a/drivers/staging/greybus/uart.c +++ b/drivers/staging/greybus/uart.c @@ -674,6 +674,7 @@ static int set_serial_info(struct gb_tty *gb_tty, static int wait_serial_change(struct gb_tty *gb_tty, unsigned long arg) { int retval = 0; + unsigned long flags; DECLARE_WAITQUEUE(wait, current); struct async_icount old; struct async_icount new; @@ -682,11 +683,11 @@ static int wait_serial_change(struct gb_tty *gb_tty, unsigned long arg) return -EINVAL; do { - spin_lock_irq(&gb_tty->read_lock); + spin_lock_irqsave(&gb_tty->read_lock, flags); old = gb_tty->oldcount; new = gb_tty->iocount; gb_tty->oldcount = new; - spin_unlock_irq(&gb_tty->read_lock); + spin_unlock_irqrestore(&gb_tty->read_lock, flags); if ((arg & TIOCM_DSR) && (old.dsr != new.dsr)) break; |