From: Mathieu Othacehe Date: Wed, 20 Feb 2019 16:49:10 +0000 (+0100) Subject: iio: trigger: Print an error if there is no available irq X-Git-Tag: v5.2-rc1~153^2~149^2~123 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=be35d281da6af5f147383f06d050426901b2d25f;p=linux.git 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 Signed-off-by: Jonathan Cameron --- 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,