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Date: Wed,  5 Jun 2024 17:59:48 +0000
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Subject: [PATCH v1 04/17] iio: pressure: bmp280: Change nvmem reg_read/write
 return type
From: Joy Chakraborty <joychakr@google.com>
To: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>, 
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>, 
	Lars-Peter Clausen <lars@metafoo.de>, Sakari Ailus <sakari.ailus@linux.intel.com>, 
	Bingbu Cao <bingbu.cao@intel.com>, Zhihao Cheng <chengzhihao1@huawei.com>, 
	Jerome Brunet <jbrunet@baylibre.com>, 
	Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, 
	linux-iio@vger.kernel.org, linux-media@vger.kernel.org, 
	linux-i2c@vger.kernel.org, linux-gpio@vger.kernel.org, 
	linux-mtd@lists.infradead.org, linux-rtc@vger.kernel.org, 
	linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, 
	linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, 
	linux-usb@vger.kernel.org, manugautam@google.com, 
	Joy Chakraborty <joychakr@google.com>
Content-Type: text/plain; charset="UTF-8"

Change nvmem read/write function definition return type to ssize_t.

Signed-off-by: Joy Chakraborty <joychakr@google.com>
---
 drivers/iio/pressure/bmp280-core.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
index 09f53d987c7d..8d5aeabfa297 100644
--- a/drivers/iio/pressure/bmp280-core.c
+++ b/drivers/iio/pressure/bmp280-core.c
@@ -1465,10 +1465,11 @@ static const int bmp580_odr_table[][2] = {
 
 static const int bmp580_nvmem_addrs[] = { 0x20, 0x21, 0x22 };
 
-static int bmp580_nvmem_read(void *priv, unsigned int offset, void *val,
-			     size_t bytes)
+static ssize_t bmp580_nvmem_read(void *priv, unsigned int offset, void *val,
+				 size_t bytes)
 {
 	struct bmp280_data *data = priv;
+	size_t bytes_read = bytes;
 	u16 *dst = val;
 	int ret, addr;
 
@@ -1518,13 +1519,14 @@ static int bmp580_nvmem_read(void *priv, unsigned int offset, void *val,
 	mutex_unlock(&data->lock);
 	pm_runtime_mark_last_busy(data->dev);
 	pm_runtime_put_autosuspend(data->dev);
-	return ret;
+	return ret < 0 ? ret : bytes_read;
 }
 
-static int bmp580_nvmem_write(void *priv, unsigned int offset, void *val,
-			      size_t bytes)
+static ssize_t bmp580_nvmem_write(void *priv, unsigned int offset, void *val,
+				  size_t bytes)
 {
 	struct bmp280_data *data = priv;
+	size_t bytes_written = bytes;
 	u16 *buf = val;
 	int ret, addr;
 
@@ -1582,7 +1584,7 @@ static int bmp580_nvmem_write(void *priv, unsigned int offset, void *val,
 	mutex_unlock(&data->lock);
 	pm_runtime_mark_last_busy(data->dev);
 	pm_runtime_put_autosuspend(data->dev);
-	return ret;
+	return ret < 0 ? ret : bytes_written;
 }
 
 static int bmp580_preinit(struct bmp280_data *data)
-- 
2.45.1.467.gbab1589fc0-goog