drivers/rtc/rtc-twl.c: fix threaded IRQ to use IRQF_ONESHOT
authorKevin Hilman <khilman@ti.com>
Wed, 11 Jul 2012 21:02:44 +0000 (14:02 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 11 Jul 2012 23:04:48 +0000 (16:04 -0700)
Requesting a threaded interrupt without a primary handler and without
IRQF_ONESHOT is dangerous, and after commit 1c6c6952 ("genirq: Reject
bogus threaded irq requests"), these requests are rejected.  This causes
->probe() to fail, and the RTC driver not to be availble.

To fix, add IRQF_ONESHOT to the IRQ flags.

Tested on OMAP3730/OveroSTORM and OMAP4430/Panda board using rtcwake to
wake from system suspend multiple times.

Signed-off-by: Kevin Hilman <khilman@ti.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/rtc/rtc-twl.c

index 258abeabf6246a1ed7e4db116713bb3128009fa0..c5d06fe83bba6274f2e6b944a43489395e04e01c 100644 (file)
@@ -510,7 +510,7 @@ static int __devinit twl_rtc_probe(struct platform_device *pdev)
        }
 
        ret = request_threaded_irq(irq, NULL, twl_rtc_interrupt,
-                                  IRQF_TRIGGER_RISING,
+                                  IRQF_TRIGGER_RISING | IRQF_ONESHOT,
                                   dev_name(&rtc->dev), rtc);
        if (ret < 0) {
                dev_err(&pdev->dev, "IRQ is not free.\n");