Use sysfs_emit() instead of sprintf() for writing to the sysfs
output buffer. sysfs_emit() is aware of the buffer's PAGE_SIZE
limit and is the preferred helper for sysfs callbacks.

Signed-off-by: Donggeun Yoo <donggeunyoo.kernel@gmail.com>
---
v1 -> v2: Add #include <linux/sysfs.h> for sysfs_emit() instead of
relying on transitive includes. (Suggested by Joshua Crofts)

v1: https://lore.kernel.org/linux-iio/20260830054237.2147950-1-donggeunyoo.kernel@gmail.com/

 drivers/iio/light/vcnl4000.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c
index 336468d59ea7..911f8d1c74d4 100644
--- a/drivers/iio/light/vcnl4000.c
+++ b/drivers/iio/light/vcnl4000.c
@@ -26,6 +26,7 @@
 #include <linux/module.h>
 #include <linux/pm_runtime.h>
 #include <linux/regulator/consumer.h>
+#include <linux/sysfs.h>
 #include <linux/units.h>
 
 #include <linux/iio/buffer.h>
@@ -1504,7 +1505,7 @@ static ssize_t vcnl4000_read_near_level(struct iio_dev *indio_dev,
 {
 	struct vcnl4000_data *data = iio_priv(indio_dev);
 
-	return sprintf(buf, "%u\n", data->near_level);
+	return sysfs_emit(buf, "%u\n", data->near_level);
 }
 
 static irqreturn_t vcnl4010_irq_thread(int irq, void *p)

base-commit: 350d1fb9204b13c5f95e511e98b8bcb47574d425
-- 
2.53.0

On Mon, 31 Aug 2026 03:53:45 +0900
Donggeun Yoo <donggeunyoo.kernel@gmail.com> wrote:

> Use sysfs_emit() instead of sprintf() for writing to the sysfs
> output buffer. sysfs_emit() is aware of the buffer's PAGE_SIZE
> limit and is the preferred helper for sysfs callbacks.
> 
> Signed-off-by: Donggeun Yoo <donggeunyoo.kernel@gmail.com>
> ---

Seems fine.

Reviewed-by: Joshua Crofts <joshua.crofts1@gmail.com>

-- 
Kind regards,
Joshua Crofts

On Mon, 31 Aug 2026 11:12:43 +0200
Joshua Crofts <joshua.crofts1@gmail.com> wrote:

> On Mon, 31 Aug 2026 03:53:45 +0900
> Donggeun Yoo <donggeunyoo.kernel@gmail.com> wrote:
> 
> > Use sysfs_emit() instead of sprintf() for writing to the sysfs
> > output buffer. sysfs_emit() is aware of the buffer's PAGE_SIZE
> > limit and is the preferred helper for sysfs callbacks.
> > 
> > Signed-off-by: Donggeun Yoo <donggeunyoo.kernel@gmail.com>
> > ---  
> 
> Seems fine.
> 
> Reviewed-by: Joshua Crofts <joshua.crofts1@gmail.com>
> 

Applied. Forgot to say the other day (or update patchwork).

J