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Without the IRQF_ONESHOT flag in devm_request_threaded_irq() call I get
following error:
genirq: Threaded irq requested with handler=NULL and !ONESHOT for irq 56
gpio-keys gpio-keys: failed to request irq:56 for gpio:20
>From kernel/irq/manage.c:
The interrupt was requested with handler = NULL, so we use the default
primary handler for it. But it does not have the oneshot flag set. In
combination with level interrupts this is deadly, because the default
primary handler just wakes the thread, then the irq lines is reenabled,
but the device still has the level irq asserted. Rinse and repeat....
While this works for edge type interrupts, we play it safe and reject
unconditionally because we can't say for sure which type this interrupt
really has. The type flags are unreliable as the underlying chip
implementation can override them.
Signed-off-by: Petr Štetiar <ynezz@true.cz>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@48894 3c298f89-4303-0410-b956-a3cf2f4a3e73
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@44110 3c298f89-4303-0410-b956-a3cf2f4a3e73
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Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40765 3c298f89-4303-0410-b956-a3cf2f4a3e73
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3.3 kernels do not have the required changes which would make
gpio-button-hotplug work, disallow building on those kernels for now.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39903 3c298f89-4303-0410-b956-a3cf2f4a3e73
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Signed-off-by: John Crispin <blogic@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37007 3c298f89-4303-0410-b956-a3cf2f4a3e73
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