diff options
| author | Mathieu Othacehe <m.othacehe@gmail.com> | 2019-02-20 17:49:10 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2019-04-04 20:19:41 +0100 |
| commit | be35d281da6af5f147383f06d050426901b2d25f (patch) | |
| tree | 5ec367970627115156391bc3a71a47b0a40129b5 /drivers/iio | |
| parent | cb57f2eb0156829f61dd946d96b1270ea7535b76 (diff) | |
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>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/industrialio-trigger.c | 5 |
1 files changed, 4 insertions, 1 deletions
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, |