diff options
| author | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2022-08-16 15:07:59 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-30 15:14:30 +0300 |
| commit | a3911f6ea5542d56366a6495f2464a312d85d15b (patch) | |
| tree | 45840ee198a6c958b2dcad330d07645588d5f969 /drivers/tty | |
| parent | 5779a072c248db7a40cfd0f5ea958097fd1d9a30 (diff) | |
| download | linux-a3911f6ea5542d56366a6495f2464a312d85d15b.tar.xz | |
serial: 8250: Add helper for clearing IER
A number of places want to clear IER with the same CAP_UUE trick.
Create a helper for that.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220816120759.11552-1-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/8250/8250_port.c | 24 |
1 files changed, 11 insertions, 13 deletions
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index 39b35a61958c..25e4761e3c57 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -752,6 +752,14 @@ static void serial8250_set_sleep(struct uart_8250_port *p, int sleep) serial8250_rpm_put(p); } +static void serial8250_clear_IER(struct uart_8250_port *up) +{ + if (up->capabilities & UART_CAP_UUE) + serial_out(up, UART_IER, UART_IER_UUE); + else + serial_out(up, UART_IER, 0); +} + #ifdef CONFIG_SERIAL_8250_RSA /* * Attempts to turn on the RSA FIFO. Returns zero on failure. @@ -1329,10 +1337,7 @@ static void autoconfig(struct uart_8250_port *up) serial8250_out_MCR(up, save_mcr); serial8250_clear_fifos(up); serial_in(up, UART_RX); - if (up->capabilities & UART_CAP_UUE) - serial_out(up, UART_IER, UART_IER_UUE); - else - serial_out(up, UART_IER, 0); + serial8250_clear_IER(up); out_unlock: spin_unlock_irqrestore(&port->lock, flags); @@ -2142,10 +2147,7 @@ static void serial8250_put_poll_char(struct uart_port *port, * First save the IER then disable the interrupts */ ier = serial_port_in(port, UART_IER); - if (up->capabilities & UART_CAP_UUE) - serial_port_out(port, UART_IER, UART_IER_UUE); - else - serial_port_out(port, UART_IER, 0); + serial8250_clear_IER(up); wait_for_xmitr(up, UART_LSR_BOTH_EMPTY); /* @@ -3383,11 +3385,7 @@ void serial8250_console_write(struct uart_8250_port *up, const char *s, * First save the IER then disable the interrupts */ ier = serial_port_in(port, UART_IER); - - if (up->capabilities & UART_CAP_UUE) - serial_port_out(port, UART_IER, UART_IER_UUE); - else - serial_port_out(port, UART_IER, 0); + serial8250_clear_IER(up); /* check scratch reg to see if port powered off during system sleep */ if (up->canary && (up->canary != serial_port_in(port, UART_SCR))) { |