linux-kernel - [PATCH] macintosh: ams: replace snprintf in show functions with sysfs

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Message-Id: <1634280544-4581-1-git-send-email-wangqing@vivo.com>
Date:   Thu, 14 Oct 2021 23:49:04 -0700
From:   Qing Wang <wangqing@...o.com>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Cc:     Qing Wang <wangqing@...o.com>
Subject: [PATCH] macintosh: ams: replace snprintf in show functions with sysfs_emit

show() must not use snprintf() when formatting the value to be
returned to user space.

Fix the following coccicheck warning:
drivers/macintosh/ams/ams-core.c:53: WARNING: use scnprintf or sprintf.

Use sysfs_emit instead of scnprintf or sprintf makes more sense.

Signed-off-by: Qing Wang <wangqing@...o.com>
---
 drivers/macintosh/ams/ams-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/macintosh/ams/ams-core.c b/drivers/macintosh/ams/ams-core.c
index 01eeb23..877e8cb 100644
--- a/drivers/macintosh/ams/ams-core.c
+++ b/drivers/macintosh/ams/ams-core.c
@@ -50,7 +50,7 @@ static ssize_t ams_show_current(struct device *dev,
 	ams_sensors(&x, &y, &z);
 	mutex_unlock(&ams_info.lock);
 
-	return snprintf(buf, PAGE_SIZE, "%d %d %d\n", x, y, z);
+	return sysfs_emit(buf, "%d %d %d\n", x, y, z);
 }
 
 static DEVICE_ATTR(current, S_IRUGO, ams_show_current, NULL);
-- 
2.7.4