From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx> Currently if the line-event kfifo is full, we just silently drop any new events. Add a ratelimited debug message so that we at least have some trace in the kernel log of event overflow. Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx> --- drivers/gpio/gpiolib.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 43d98309e725..36afe0b2b150 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -978,6 +978,8 @@ static irqreturn_t lineevent_irq_thread(int irq, void *p) 1, &le->wait.lock); if (ret) wake_up_poll(&le->wait, EPOLLIN); + else + pr_debug_ratelimited("event FIFO is full - event dropped\n"); return IRQ_HANDLED; } -- 2.25.0