linux-kernel - [PATCH v2] HID: lenovo: replace snprintf with sysfs

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Date:   Thu, 10 Feb 2022 18:30:30 +0800
From:   davidcomponentone@...il.com
To:     jikos@...nel.org
Cc:     davidcomponentone@...il.com, benjamin.tissoires@...hat.com,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Yang Guang <yang.guang5@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH v2] HID: lenovo: replace snprintf with sysfs_emit

From: Yang Guang <yang.guang5@....com.cn>

coccinelle report:
./drivers/hid/hid-lenovo.c:636:8-16:
WARNING: use scnprintf or sprintf
./drivers/hid/hid-lenovo.c:403:8-16:
WARNING: use scnprintf or sprintf
./drivers/hid/hid-lenovo.c:755:8-16:
WARNING: use scnprintf or sprintf
./drivers/hid/hid-lenovo.c:606:8-16:
WARNING: use scnprintf or sprintf
./drivers/hid/hid-lenovo.c:666:8-16:
WARNING: use scnprintf or sprintf
./drivers/hid/hid-lenovo.c:696:8-16:
WARNING: use scnprintf or sprintf
./drivers/hid/hid-lenovo.c:445:8-16:
WARNING: use scnprintf or sprintf
./drivers/hid/hid-lenovo.c:726:8-16:
WARNING: use scnprintf or sprintf

Use sysfs_emit instead of scnprintf or sprintf makes more sense.

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Yang Guang <yang.guang5@....com.cn>
Signed-off-by: David Yang <davidcomponentone@...il.com>

---
Change from v1-v2:
- Adjust some format

---
 drivers/hid/hid-lenovo.c | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/drivers/hid/hid-lenovo.c b/drivers/hid/hid-lenovo.c
index 93b1f935e526..69ae39bdbe70 100644
--- a/drivers/hid/hid-lenovo.c
+++ b/drivers/hid/hid-lenovo.c
@@ -400,7 +400,7 @@ static ssize_t attr_fn_lock_show(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", data->fn_lock);
+	return sysfs_emit(buf, "%u\n", data->fn_lock);
 }
 
 static ssize_t attr_fn_lock_store(struct device *dev,
@@ -442,8 +442,7 @@ static ssize_t attr_sensitivity_show_cptkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *cptkbd_data = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n",
-		cptkbd_data->sensitivity);
+	return sysfs_emit(buf, "%u\n", cptkbd_data->sensitivity);
 }
 
 static ssize_t attr_sensitivity_store_cptkbd(struct device *dev,
@@ -603,7 +602,7 @@ static ssize_t attr_press_to_select_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->press_to_select);
+	return sysfs_emit(buf, "%u\n", data_pointer->press_to_select);
 }
 
 static ssize_t attr_press_to_select_store_tpkbd(struct device *dev,
@@ -633,7 +632,7 @@ static ssize_t attr_dragging_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->dragging);
+	return sysfs_emit(buf, "%u\n", data_pointer->dragging);
 }
 
 static ssize_t attr_dragging_store_tpkbd(struct device *dev,
@@ -663,7 +662,7 @@ static ssize_t attr_release_to_select_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->release_to_select);
+	return sysfs_emit(buf, "%u\n", data_pointer->release_to_select);
 }
 
 static ssize_t attr_release_to_select_store_tpkbd(struct device *dev,
@@ -693,7 +692,7 @@ static ssize_t attr_select_right_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->select_right);
+	return sysfs_emit(buf, "%u\n", data_pointer->select_right);
 }
 
 static ssize_t attr_select_right_store_tpkbd(struct device *dev,
@@ -723,8 +722,7 @@ static ssize_t attr_sensitivity_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n",
-		data_pointer->sensitivity);
+	return sysfs_emit(buf, "%u\n", data_pointer->sensitivity);
 }
 
 static ssize_t attr_sensitivity_store_tpkbd(struct device *dev,
@@ -752,8 +750,7 @@ static ssize_t attr_press_speed_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n",
-		data_pointer->press_speed);
+	return sysfs_emit(buf, "%u\n", data_pointer->press_speed);
 }
 
 static ssize_t attr_press_speed_store_tpkbd(struct device *dev,
-- 
2.30.2