diff options
Diffstat (limited to 'drivers/serial/serial_core.c')
| -rw-r--r-- | drivers/serial/serial_core.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c index 977ce820ce30..f7263e104d81 100644 --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -914,14 +914,14 @@ static void uart_break_ctl(struct tty_struct *tty, int break_state) struct uart_state *state = tty->driver_data; struct uart_port *port = state->port; - BUG_ON(!kernel_locked()); - + lock_kernel(); mutex_lock(&state->mutex); if (port->type != PORT_UNKNOWN) port->ops->break_ctl(port, break_state); mutex_unlock(&state->mutex); + unlock_kernel(); } static int uart_do_autoconfig(struct uart_state *state) @@ -1059,7 +1059,7 @@ static int uart_get_count(struct uart_state *state, } /* - * Called via sys_ioctl under the BKL. We can use spin_lock_irq() here. + * Called via sys_ioctl. We can use spin_lock_irq() here. */ static int uart_ioctl(struct tty_struct *tty, struct file *filp, unsigned int cmd, @@ -1069,8 +1069,8 @@ uart_ioctl(struct tty_struct *tty, struct file *filp, unsigned int cmd, void __user *uarg = (void __user *)arg; int ret = -ENOIOCTLCMD; - BUG_ON(!kernel_locked()); + lock_kernel(); /* * These ioctls don't rely on the hardware to be present. */ @@ -1143,6 +1143,7 @@ uart_ioctl(struct tty_struct *tty, struct file *filp, unsigned int cmd, out_up: mutex_unlock(&state->mutex); out: + unlock_kernel(); return ret; } @@ -1153,7 +1154,6 @@ static void uart_set_termios(struct tty_struct *tty, unsigned long flags; unsigned int cflag = tty->termios->c_cflag; - BUG_ON(!kernel_locked()); /* * These are the bits that are used to setup various @@ -1165,9 +1165,11 @@ static void uart_set_termios(struct tty_struct *tty, if ((cflag ^ old_termios->c_cflag) == 0 && tty->termios->c_ospeed == old_termios->c_ospeed && tty->termios->c_ispeed == old_termios->c_ispeed && - RELEVANT_IFLAG(tty->termios->c_iflag ^ old_termios->c_iflag) == 0) + RELEVANT_IFLAG(tty->termios->c_iflag ^ old_termios->c_iflag) == 0) { return; + } + lock_kernel(); uart_change_speed(state, old_termios); /* Handle transition to B0 status */ @@ -1200,7 +1202,7 @@ static void uart_set_termios(struct tty_struct *tty, } spin_unlock_irqrestore(&state->port->lock, flags); } - + unlock_kernel(); #if 0 /* * No need to wake up processes in open wait, since they |