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Date: Wed,  5 Jun 2024 18:02:35 +0000
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Subject: [PATCH v1 14/17] thunderbolt: switch: 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/thunderbolt/switch.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 326433df5880..35424a65cd3a 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -301,7 +301,7 @@ int tb_switch_nvm_read(struct tb_switch *sw, unsigned int address, void *buf,
 	return dma_port_flash_read(sw->dma_port, address, buf, size);
 }
 
-static int nvm_read(void *priv, unsigned int offset, void *val, size_t bytes)
+static ssize_t nvm_read(void *priv, unsigned int offset, void *val, size_t bytes)
 {
 	struct tb_nvm *nvm = priv;
 	struct tb_switch *sw = tb_to_switch(nvm->dev);
@@ -321,10 +321,10 @@ static int nvm_read(void *priv, unsigned int offset, void *val, size_t bytes)
 	pm_runtime_mark_last_busy(&sw->dev);
 	pm_runtime_put_autosuspend(&sw->dev);
 
-	return ret;
+	return ret < 0 ? ret : bytes;
 }
 
-static int nvm_write(void *priv, unsigned int offset, void *val, size_t bytes)
+static ssize_t nvm_write(void *priv, unsigned int offset, void *val, size_t bytes)
 {
 	struct tb_nvm *nvm = priv;
 	struct tb_switch *sw = tb_to_switch(nvm->dev);
@@ -342,7 +342,7 @@ static int nvm_write(void *priv, unsigned int offset, void *val, size_t bytes)
 	ret = tb_nvm_write_buf(nvm, offset, val, bytes);
 	mutex_unlock(&sw->tb->lock);
 
-	return ret;
+	return ret < 0 ? ret : bytes;
 }
 
 static int tb_switch_nvm_add(struct tb_switch *sw)
-- 
2.45.1.467.gbab1589fc0-goog