Commit be35d281 authored Feb 20, 2019 by Mathieu Othacehe Committed by Jonathan Cameron Apr 04, 2019

iio: trigger: Print an error if there is no available irq



If there are more trigger consumers than
CONFIG_IIO_CONSUMERS_PER_TRIGGER, iio_trigger_attach_poll_func will
silently fail. Add an error message to inform the user that
CONFIG_IIO_CONSUMERS_PER_TRIGGER limit might be exceeded.

Signed-off-by: Mathieu Othacehe <m.othacehe@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

parent cb57f2eb

drivers/iio/industrialio-trigger.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -254,8 +254,11 @@ static int iio_trigger_attach_poll_func(struct iio_trigger *trig,

		/* Get irq number */
		pf->irq = iio_trigger_get_irq(trig);
		if (pf->irq < 0)
		if (pf->irq < 0) {
		pr_err("Could not find an available irq for trigger %s, CONFIG_IIO_CONSUMERS_PER_TRIGGER=%d limit might be exceeded\n",
		trig->name, CONFIG_IIO_CONSUMERS_PER_TRIGGER);
		goto out_put_module;
		}

		/* Request irq */
		ret = request_threaded_irq(pf->irq, pf->h, pf->thread,

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