Follow the advice in Documentation/filesystems/sysfs.rst:
show() should only use sysfs_emit() or sysfs_emit_at() when formatting
the value to be returned to user space.

Signed-off-by: Ai Chao <aichao@kylinos.cn>
---
 drivers/platform/chrome/wilco_ec/sysfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/chrome/wilco_ec/sysfs.c b/drivers/platform/chrome/wilco_ec/sysfs.c
index 893c59dde32a..d44c43559621 100644
--- a/drivers/platform/chrome/wilco_ec/sysfs.c
+++ b/drivers/platform/chrome/wilco_ec/sysfs.c
@@ -192,7 +192,7 @@ static ssize_t usb_charge_show(struct device *dev,
 	if (ret < 0)
 		return ret;
 
-	return sprintf(buf, "%d\n", rs.val);
+	return sysfs_emit(buf, "%d\n", rs.val);
 }
 
 static ssize_t usb_charge_store(struct device *dev,
-- 
2.25.1

On Thu, Mar 14, 2024 at 01:28:28PM +0800, Ai Chao wrote:
> Follow the advice in Documentation/filesystems/sysfs.rst:
> show() should only use sysfs_emit() or sysfs_emit_at() when formatting
> the value to be returned to user space.

It seems we overlooked the case when handling [1].  Will queue the patch
after for-next rebased to next -rc1.

[1] https://patchwork.kernel.org/project/chrome-platform/patch/202212021656040995199@zte.com.cn/