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hid: cp2112: Fix IRQ shutdown stopping polling for all IRQs on chip

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[ Upstream commit dc3115e6c5d9863ec1a9ff1acf004ede93c34361 ]

Previously cp2112_gpio_irq_shutdown() always cancelled the
gpio_poll_worker, even if other IRQs were still active, and did not set
the gpio_poll flag to false. This resulted in any call to _shutdown()
resulting in interrupts no longer functioning on the chip until a
_remove() occurred (a.e. the cp2112 is unplugged or system rebooted).

Only cancel polling if all IRQs are disabled/masked, and correctly set
the gpio_poll flag, allowing polling to restart when an interrupt is
next enabled.

Signed-off-by: Danny Kaehn <danny.kaehn@plexus.com>
Fixes: 13de9cca514e ("HID: cp2112: add IRQ chip handling")
Link: https://lore.kernel.org/r/20231011182317.1053344-1-danny.kaehn@plexus.com
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Danny Kaehn 2023-10-11 13:23:17 -05:00 committed by Ksawlii
parent 9277c67c4e
commit 749c33aece
1 changed files with 4 additions and 1 deletions
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5
drivers/hid/hid-cp2112.c
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@ -1171,7 +1171,10 @@ static void cp2112_gpio_irq_shutdown(struct irq_data *d)
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct cp2112_device *dev = gpiochip_get_data(gc);
cancel_delayed_work_sync(&dev->gpio_poll_worker);
if (!dev->irq_mask) {
dev->gpio_poll = false;
cancel_delayed_work_sync(&dev->gpio_poll_worker);
}
}
static int cp2112_gpio_irq_type(struct irq_data *d, unsigned int type)