5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Danny Kaehn danny.kaehn@plexus.com
[ 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 --- drivers/hid/hid-cp2112.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/hid/hid-cp2112.c +++ b/drivers/hid/hid-cp2112.c @@ -1171,7 +1171,10 @@ static void cp2112_gpio_irq_shutdown(str 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)