[PATCH 1/3] tty: serial: meson: modify request_irq and free_irq

Yu Tu
2021-12-21T07:32:10Z

Change request_irq to devm_request_irq and free_irq to devm_free_irq.
It's better to change the code this way.

The IRQF_SHARED interrupt flag was added because an interrupt error was
detected when the serial port was opened twice in a row on the project.

Signed-off-by: Yu Tu <yu.tu@amlogic.com>
---
drivers/tty/serial/meson_uart.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index d2c08b760f83..02fafb8229d2 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -121,7 +121,7 @@ static void meson_uart_shutdown(struct uart_port *port)
unsigned long flags;
u32 val;

- free_irq(port->irq, port);
+ devm_free_irq(port->dev, port->irq, port);

spin_lock_irqsave(&port->lock, flags);

@@ -287,8 +287,8 @@ static int meson_uart_startup(struct uart_port *port)
val = (AML_UART_RECV_IRQ(1) | AML_UART_XMIT_IRQ(port->fifosize / 2));
writel(val, port->membase + AML_UART_MISC);

- ret = request_irq(port->irq, meson_uart_interrupt, 0,
- port->name, port);
+ ret = devm_request_irq(port->dev, port->irq, meson_uart_interrupt,
+ IRQF_SHARED, port->name, port);

return ret;
}
--
2.33.1