diff options
| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2015-10-30 05:39:03 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-12-14 06:59:48 +0300 |
| commit | 2cda227bba7e8398c6f8a7792c7f35818187dcc6 (patch) | |
| tree | 9d5a7d0a206b7c3f3ad987cf9cf883cb8347184d /drivers/tty | |
| parent | c0f160a7355380e9b7f9c5cbb1a0f9eecf6ec601 (diff) | |
| download | linux-2cda227bba7e8398c6f8a7792c7f35818187dcc6.tar.xz | |
serial: 8250_early: do not save and restore IER in write callback
The IER has already been masked in early_serial8250_setup(), there is
no reason to save and restore it every time early_serial8250_write()
is called.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/8250/8250_early.c | 11 |
1 files changed, 1 insertions, 10 deletions
diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c index ceb85792a5cf..5afc4d440304 100644 --- a/drivers/tty/serial/8250/8250_early.c +++ b/drivers/tty/serial/8250/8250_early.c @@ -96,20 +96,11 @@ static void __init early_serial8250_write(struct console *console, { struct earlycon_device *device = console->data; struct uart_port *port = &device->port; - unsigned int ier; - - /* Save the IER and disable interrupts preserving the UUE bit */ - ier = serial8250_early_in(port, UART_IER); - if (ier) - serial8250_early_out(port, UART_IER, ier & UART_IER_UUE); uart_console_write(port, s, count, serial_putc); - /* Wait for transmitter to become empty and restore the IER */ + /* Wait for transmitter to become empty */ wait_for_xmitr(port); - - if (ier) - serial8250_early_out(port, UART_IER, ier); } static void __init init_port(struct earlycon_device *device) |