linux-kernel - [PATCH 2/2] iio: sx9500: Use complete() instead of complete

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Date:	Thu,  4 Aug 2016 15:07:10 +0200
From:	Daniel Wagner <wagi@...om.org>
To:	Jonathan Cameron <jic23@...nel.org>
Cc:	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	Daniel Wagner <daniel.wagner@...-carit.de>
Subject: [PATCH 2/2] iio: sx9500: Use complete() instead of complete_all()

From: Daniel Wagner <daniel.wagner@...-carit.de>

There is only one waiter for the completion, therefore there
is no need to use complete_all(). Let's make that clear by
using complete() instead of complete_all().

The usage pattern of the completion is:

waiter context                          waker context

sx9500_read_proximity()
  sx9500_inc_chan_users()
  sx9500_inc_data_rdy_users()
  wait_for_completion_interruptible()

                                        s9500_irq_thread_handler()
                                          complete()

  reinit_completion()

Signed-off-by: Daniel Wagner <daniel.wagner@...-carit.de>
---
 drivers/iio/proximity/sx9500.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/proximity/sx9500.c b/drivers/iio/proximity/sx9500.c
index 1d74b3a..6f84f53 100644
--- a/drivers/iio/proximity/sx9500.c
+++ b/drivers/iio/proximity/sx9500.c
@@ -516,7 +516,7 @@ static irqreturn_t sx9500_irq_thread_handler(int irq, void *private)
 		sx9500_push_events(indio_dev);
 
 	if (val & SX9500_CONVDONE_IRQ)
-		complete_all(&data->completion);
+		complete(&data->completion);
 
 out:
 	mutex_unlock(&data->mutex);
-- 
2.7.4