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>
diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c
index ce66699..e5b5383 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,
