linux-kernel - [PATCH 2/8] iio: adc: exynos_adc: use 'time_left' variable with wait_for_completion

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Date: Mon, 29 Apr 2024 13:33:05 +0200
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: linux-iio@...r.kernel.org
Cc: Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Jonathan Cameron <jic23@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/8] iio: adc: exynos_adc: use 'time_left' variable with wait_for_completion_timeout()

There is a confusing pattern in the kernel to use a variable named 'timeout' to
store the result of wait_for_completion_timeout() causing patterns like:

	timeout = wait_for_completion_timeout(...)
	if (!timeout) return -ETIMEDOUT;

with all kinds of permutations. Use 'time_left' as a variable to make the code
self explaining.

Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
---
 drivers/iio/adc/exynos_adc.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
index 614de9644800..78fada4b7b1c 100644
--- a/drivers/iio/adc/exynos_adc.c
+++ b/drivers/iio/adc/exynos_adc.c
@@ -538,7 +538,7 @@ static int exynos_read_raw(struct iio_dev *indio_dev,
 				long mask)
 {
 	struct exynos_adc *info = iio_priv(indio_dev);
-	unsigned long timeout;
+	unsigned long time_left;
 	int ret;
 
 	if (mask == IIO_CHAN_INFO_SCALE) {
@@ -562,9 +562,9 @@ static int exynos_read_raw(struct iio_dev *indio_dev,
 	if (info->data->start_conv)
 		info->data->start_conv(info, chan->address);
 
-	timeout = wait_for_completion_timeout(&info->completion,
-					      EXYNOS_ADC_TIMEOUT);
-	if (timeout == 0) {
+	time_left = wait_for_completion_timeout(&info->completion,
+						EXYNOS_ADC_TIMEOUT);
+	if (time_left == 0) {
 		dev_warn(&indio_dev->dev, "Conversion timed out! Resetting\n");
 		if (info->data->init_hw)
 			info->data->init_hw(info);
@@ -583,7 +583,7 @@ static int exynos_read_raw(struct iio_dev *indio_dev,
 static int exynos_read_s3c64xx_ts(struct iio_dev *indio_dev, int *x, int *y)
 {
 	struct exynos_adc *info = iio_priv(indio_dev);
-	unsigned long timeout;
+	unsigned long time_left;
 	int ret;
 
 	mutex_lock(&info->lock);
@@ -597,9 +597,9 @@ static int exynos_read_s3c64xx_ts(struct iio_dev *indio_dev, int *x, int *y)
 	/* Select the ts channel to be used and Trigger conversion */
 	info->data->start_conv(info, ADC_S3C2410_MUX_TS);
 
-	timeout = wait_for_completion_timeout(&info->completion,
-					      EXYNOS_ADC_TIMEOUT);
-	if (timeout == 0) {
+	time_left = wait_for_completion_timeout(&info->completion,
+						EXYNOS_ADC_TIMEOUT);
+	if (time_left == 0) {
 		dev_warn(&indio_dev->dev, "Conversion timed out! Resetting\n");
 		if (info->data->init_hw)
 			info->data->init_hw(info);
-- 
2.43.0