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

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Message-Id: <1634095680-4377-1-git-send-email-wangqing@vivo.com>
Date:   Tue, 12 Oct 2021 20:28:00 -0700
From:   Qing Wang <wangqing@...o.com>
To:     dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Qing Wang <wangqing@...o.com>
Subject: [PATCH] video: fbdev: replace snprintf in show functions with sysfs_emit

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

Fix the coccicheck warning:
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/video/fbdev/core/fbsysfs.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/video/fbdev/core/fbsysfs.c b/drivers/video/fbdev/core/fbsysfs.c
index 65dae05..2689294 100644
--- a/drivers/video/fbdev/core/fbsysfs.c
+++ b/drivers/video/fbdev/core/fbsysfs.c
@@ -230,7 +230,7 @@ static ssize_t show_bpp(struct device *device, struct device_attribute *attr,
 			char *buf)
 {
 	struct fb_info *fb_info = dev_get_drvdata(device);
-	return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->var.bits_per_pixel);
+	return sysfs_emit(buf, "%d\n", fb_info->var.bits_per_pixel);
 }
 
 static ssize_t store_rotate(struct device *device,
@@ -257,7 +257,7 @@ static ssize_t show_rotate(struct device *device,
 {
 	struct fb_info *fb_info = dev_get_drvdata(device);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->var.rotate);
+	return sysfs_emit(buf, "%d\n", fb_info->var.rotate);
 }
 
 static ssize_t store_virtual(struct device *device,
@@ -285,7 +285,7 @@ static ssize_t show_virtual(struct device *device,
 			    struct device_attribute *attr, char *buf)
 {
 	struct fb_info *fb_info = dev_get_drvdata(device);
-	return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xres_virtual,
+	return sysfs_emit(buf, "%d,%d\n", fb_info->var.xres_virtual,
 			fb_info->var.yres_virtual);
 }
 
@@ -293,7 +293,7 @@ static ssize_t show_stride(struct device *device,
 			   struct device_attribute *attr, char *buf)
 {
 	struct fb_info *fb_info = dev_get_drvdata(device);
-	return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->fix.line_length);
+	return sysfs_emit(buf, "%d\n", fb_info->fix.line_length);
 }
 
 static ssize_t store_blank(struct device *device,
@@ -381,7 +381,7 @@ static ssize_t show_pan(struct device *device,
 			struct device_attribute *attr, char *buf)
 {
 	struct fb_info *fb_info = dev_get_drvdata(device);
-	return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xoffset,
+	return sysfs_emit(buf, "%d,%d\n", fb_info->var.xoffset,
 			fb_info->var.yoffset);
 }
 
@@ -390,7 +390,7 @@ static ssize_t show_name(struct device *device,
 {
 	struct fb_info *fb_info = dev_get_drvdata(device);
 
-	return snprintf(buf, PAGE_SIZE, "%s\n", fb_info->fix.id);
+	return sysfs_emit(buf, "%s\n", fb_info->fix.id);
 }
 
 static ssize_t store_fbstate(struct device *device,
@@ -418,7 +418,7 @@ static ssize_t show_fbstate(struct device *device,
 			    struct device_attribute *attr, char *buf)
 {
 	struct fb_info *fb_info = dev_get_drvdata(device);
-	return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->state);
+	return sysfs_emit(buf, "%d\n", fb_info->state);
 }
 
 #if IS_ENABLED(CONFIG_FB_BACKLIGHT)
-- 
2.7.4