linux-kernel - [PATCH v2 2/3] Input: ad7897 - use devm_add_action_or

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Date:   Wed,  8 Nov 2017 16:04:02 +0200
From:   Andi Shyti <andi@...zian.org>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Michael Hennerich <michael.hennerich@...log.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andi Shyti <andi@...zian.org>,
        Andi Shyti <andi.shyti@...sung.com>
Subject: [PATCH v2 2/3] Input: ad7897 - use devm_add_action_or_reset to disable the device

Use the ad7877_disable() as a custom action when the driver gets
removed instead of calling it from the remove function.

Because ad7877_remove() was just calling the disable function,
get rid of it.

CC: Michael Hennerich <michael.hennerich@...log.com>
Signed-off-by: Andi Shyti <andi@...zian.org>
---
 drivers/input/touchscreen/ad7877.c | 20 +++++++-------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/drivers/input/touchscreen/ad7877.c b/drivers/input/touchscreen/ad7877.c
index c8a143db8681..cf59e569d890 100644
--- a/drivers/input/touchscreen/ad7877.c
+++ b/drivers/input/touchscreen/ad7877.c
@@ -417,8 +417,10 @@ static irqreturn_t ad7877_irq(int irq, void *handle)
 	return IRQ_HANDLED;
 }
 
-static void ad7877_disable(struct ad7877 *ts)
+static void ad7877_disable(void *data)
 {
+	struct ad7877 *ts = data;
+
 	mutex_lock(&ts->mutex);
 
 	if (!ts->disabled) {
@@ -712,6 +714,10 @@ static int ad7877_probe(struct spi_device *spi)
 	if (!input_dev)
 		return -ENOMEM;
 
+	err = devm_add_action_or_reset(&spi->dev, ad7877_disable, ts);
+	if (err)
+		return err;
+
 	spi_set_drvdata(spi, ts);
 	ts->spi = spi;
 	ts->input = input_dev;
@@ -787,17 +793,6 @@ static int ad7877_probe(struct spi_device *spi)
 	return input_register_device(input_dev);
 }
 
-static int ad7877_remove(struct spi_device *spi)
-{
-	struct ad7877 *ts = spi_get_drvdata(spi);
-
-	ad7877_disable(ts);
-
-	dev_dbg(&spi->dev, "unregistered touchscreen\n");
-
-	return 0;
-}
-
 static int __maybe_unused ad7877_suspend(struct device *dev)
 {
 	struct ad7877 *ts = dev_get_drvdata(dev);
@@ -824,7 +819,6 @@ static struct spi_driver ad7877_driver = {
 		.pm	= &ad7877_pm,
 	},
 	.probe		= ad7877_probe,
-	.remove		= ad7877_remove,
 };
 
 module_spi_driver(ad7877_driver);
-- 
2.15.0