commit 03a58ea5905fdbd93ff9e52e670d802600ba38cd upstream.
When set_config changes a line from input to output debounce is implicitly disabled, as debounce makes no sense for outputs, but the debounce period is not being cleared and is still reported in the line info.
So clear the debounce period when the debouncer is stopped in edge_detector_stop().
Fixes: 65cff7046406 ("gpiolib: cdev: support setting debounce") Cc: stable@vger.kernel.org Signed-off-by: Kent Gibson warthog618@gmail.com Reviewed-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Bartosz Golaszewski bgolaszewski@baylibre.com --- drivers/gpio/gpiolib-cdev.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c index 12b679ca552c..3551aaf5a361 100644 --- a/drivers/gpio/gpiolib-cdev.c +++ b/drivers/gpio/gpiolib-cdev.c @@ -756,6 +756,8 @@ static void edge_detector_stop(struct line *line) cancel_delayed_work_sync(&line->work); WRITE_ONCE(line->sw_debounced, 0); line->eflags = 0; + if (line->desc) + WRITE_ONCE(line->desc->debounce_period_us, 0); /* do not change line->level - see comment in debounced_value() */ }