diff options
Diffstat (limited to 'drivers/tty/serial/8250/8250_mtk.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_mtk.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c index fb1d5ec0940e..aa8e98164d68 100644 --- a/drivers/tty/serial/8250/8250_mtk.c +++ b/drivers/tty/serial/8250/8250_mtk.c @@ -222,11 +222,17 @@ static void mtk8250_shutdown(struct uart_port *port) static void mtk8250_disable_intrs(struct uart_8250_port *up, int mask) { + /* Port locked to synchronize UART_IER access against the console. */ + lockdep_assert_held_once(&up->port.lock); + serial_out(up, UART_IER, serial_in(up, UART_IER) & (~mask)); } static void mtk8250_enable_intrs(struct uart_8250_port *up, int mask) { + /* Port locked to synchronize UART_IER access against the console. */ + lockdep_assert_held_once(&up->port.lock); + serial_out(up, UART_IER, serial_in(up, UART_IER) | mask); } @@ -235,6 +241,9 @@ static void mtk8250_set_flow_ctrl(struct uart_8250_port *up, int mode) struct uart_port *port = &up->port; int lcr = serial_in(up, UART_LCR); + /* Port locked to synchronize UART_IER access against the console. */ + lockdep_assert_held_once(&port->lock); + serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, MTK_UART_EFR, UART_EFR_ECB); serial_out(up, UART_LCR, lcr); |