[PATCH v2 5/6] watchdog: at91sam9: request the irq with IRQF_NO_SUSPEND
From: linux@roeck-us.net (Guenter Roeck)
Date: 2015-03-02 14:11:27
Also in:
linux-pm, linux-rtc, linux-serial, linux-watchdog, lkml
On 03/02/2015 01:18 AM, Boris Brezillon wrote:
The watchdog interrupt (only used when activating software watchdog) shouldn't be suspended when entering suspend mode, because it is shared with a timer device (which request the line with IRQF_NO_SUSPEND) and once the watchdog "Mode Register" has been written, it cannot be changed (which means we cannot disable the watchdog interrupt when entering suspend). Signed-off-by: Boris Brezillon <redacted>
Acked-by: Guenter Roeck <linux@roeck-us.net>
quoted hunk ↗ jump to hunk
--- drivers/watchdog/at91sam9_wdt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c index 6df9405..1443b3c 100644 --- a/drivers/watchdog/at91sam9_wdt.c +++ b/drivers/watchdog/at91sam9_wdt.c@@ -208,7 +208,8 @@ static int at91_wdt_init(struct platform_device *pdev, struct at91wdt *wdt) if ((tmp & AT91_WDT_WDFIEN) && wdt->irq) { err = request_irq(wdt->irq, wdt_interrupt, - IRQF_SHARED | IRQF_IRQPOLL, + IRQF_SHARED | IRQF_IRQPOLL | + IRQF_NO_SUSPEND, pdev->name, wdt); if (err) return err;