[PATCH v2] staging: fieldbus: replace snprintf in show functions with sysfs_emit

[Deepak R Varma <drv@mailo.com>]

The show() methods should only use sysfs_emit() when formatting values
to be returned to the user space.
Ref: Documentation/filesystems/sysfs.rst
Issue identified by coccicheck.

Signed-off-by: Deepak R Varma <drv@mailo.com>
---

Changes in v2:
   1. Switch to using sysfs_emit instead of scnprintf
   2. Update patch subject and log accordingly
      Feedback from gregkh@linuxfoundation.org


 drivers/staging/fieldbus/dev_core.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/fieldbus/dev_core.c b/drivers/staging/fieldbus/dev_core.c
index 5aab734606ea..d32599f4eb44 100644
--- a/drivers/staging/fieldbus/dev_core.c
+++ b/drivers/staging/fieldbus/dev_core.c
@@ -67,10 +67,10 @@ static ssize_t card_name_show(struct device *dev, struct device_attribute *attr,
 	struct fieldbus_dev *fb = dev_get_drvdata(dev);

 	/*
-	 * card_name was provided by child driver, could potentially be long.
-	 * protect against buffer overrun.
+	 * sysfs provides PAGE_SIZE long buffer to take care of potentially
+	 * long card_name provided by child driver.
 	 */
-	return snprintf(buf, PAGE_SIZE, "%s\n", fb->card_name);
+	return sysfs_emit(buf, "%s\n", fb->card_name);
 }
 static DEVICE_ATTR_RO(card_name);

--
2.34.1