Messages in this thread Patch in this message | | | From | Boris Brezillon <> | Subject | [PATCH 5/5] tty: serial: atmel: request IRQ with IRQF_SUSPEND_NOACTION | Date | Mon, 15 Dec 2014 17:15:52 +0100 |
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The IRQ line connected to the DBGU UART is often shared with a timer device which request the IRQ with IRQF_NO_SUSPEND. Since the UART driver is correctly disabling IRQs when entering suspend we can safely request the IRQ with IRQF_SUSPEND_NOACTION so that irq core can suspend this specific handler.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> --- drivers/tty/serial/atmel_serial.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index 4d848a2..0c252ff 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -1725,7 +1725,8 @@ static int atmel_startup(struct uart_port *port) /* * Allocate the IRQ */ - retval = request_irq(port->irq, atmel_interrupt, IRQF_SHARED, + retval = request_irq(port->irq, atmel_interrupt, + IRQF_SHARED | IRQF_SUSPEND_NOACTION, tty ? tty->name : "atmel_serial", port); if (retval) { dev_err(port->dev, "atmel_startup - Can't get irq\n"); -- 1.9.1
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