Messages in this thread Patch in this message | | | From | Mathieu Othacehe <> | Subject | [PATCH v2] iio: trigger: Print an error if there is no available irq | Date | Wed, 20 Feb 2019 17:49:10 +0100 |
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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> --- drivers/iio/industrialio-trigger.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c index ce66699c7fcc..e5b538379ed1 100644 --- a/drivers/iio/industrialio-trigger.c +++ b/drivers/iio/industrialio-trigger.c @@ -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, -- 2.17.1
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