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

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Message-Id: <1634095668-4319-1-git-send-email-wangqing@vivo.com>
Date:   Tue, 12 Oct 2021 20:27:47 -0700
From:   Qing Wang <wangqing@...o.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Qing Wang <wangqing@...o.com>
Subject: [PATCH] usb: replace snprintf in show functions with sysfs_emit

coccicheck complains about the use of snprintf() in sysfs show functions.

Fix the following coccicheck warning:
drivers/usb/core/sysfs.c:730:8-16: WARNING: use scnprintf or sprintf.
drivers/usb/core/sysfs.c:921:8-16: 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/usb/core/sysfs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index fa2e49d..6387c0d 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -727,7 +727,7 @@ static ssize_t authorized_show(struct device *dev,
 			       struct device_attribute *attr, char *buf)
 {
 	struct usb_device *usb_dev = to_usb_device(dev);
-	return snprintf(buf, PAGE_SIZE, "%u\n", usb_dev->authorized);
+	return sysfs_emit(buf, "%u\n", usb_dev->authorized);
 }
 
 /*
@@ -918,7 +918,7 @@ static ssize_t authorized_default_show(struct device *dev,
 	struct usb_hcd *hcd;
 
 	hcd = bus_to_hcd(usb_bus);
-	return snprintf(buf, PAGE_SIZE, "%u\n", hcd->dev_policy);
+	return sysfs_emit(buf, "%u\n", hcd->dev_policy);
 }
 
 static ssize_t authorized_default_store(struct device *dev,
-- 
2.7.4