Commit 248ae175 authored Nov 29, 2019 by Bartosz Golaszewski

gpiolib: emit a debug message when adding events to a full kfifo

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@baylibre.com>

parent dea9c80e

drivers/gpio/gpiolib.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}

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