fbcon: Use static attribute groups for sysfs entries

Using device_create_with_groups() to simplify creation and removal.
Same as commit 1083a7b ("tty: Use static attribute groups for
sysfs entries").

Signed-off-by: Shixiong Ou <oushixiong@kylinos.cn>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>

Author: Shixiong Ou

drivers/video/fbdev/core/fbcon.c

@@ -160,7 +160,6 @@ static int info_idx = -1;
 
 /* console rotation */
 static int initial_rotation = -1;
-static int fbcon_has_sysfs;
 static int margin_color;
 
 static const struct consw fb_con;
@@ -3159,7 +3158,7 @@ static const struct consw fb_con = {
 	.con_debug_leave	= fbcon_debug_leave,
 };
 
-static ssize_t store_rotate(struct device *device,
+static ssize_t rotate_store(struct device *device,
 			    struct device_attribute *attr, const char *buf,
 			    size_t count)
 {
@@ -3181,7 +3180,7 @@ static ssize_t store_rotate(struct device *device,
 	return count;
 }
 
-static ssize_t store_rotate_all(struct device *device,
+static ssize_t rotate_all_store(struct device *device,
 				struct device_attribute *attr,const char *buf,
 				size_t count)
 {
@@ -3203,7 +3202,7 @@ static ssize_t store_rotate_all(struct device *device,
 	return count;
 }
 
-static ssize_t show_rotate(struct device *device,
+static ssize_t rotate_show(struct device *device,
 			   struct device_attribute *attr,char *buf)
 {
 	struct fb_info *info;
@@ -3222,7 +3221,7 @@ static ssize_t show_rotate(struct device *device,
 	return sysfs_emit(buf, "%d\n", rotate);
 }
 
-static ssize_t show_cursor_blink(struct device *device,
+static ssize_t cursor_blink_show(struct device *device,
 				 struct device_attribute *attr, char *buf)
 {
 	struct fb_info *info;
@@ -3247,7 +3246,7 @@ static ssize_t show_cursor_blink(struct device *device,
 	return sysfs_emit(buf, "%d\n", blink);
 }
 
-static ssize_t store_cursor_blink(struct device *device,
+static ssize_t cursor_blink_store(struct device *device,
 				  struct device_attribute *attr,
 				  const char *buf, size_t count)
 {
@@ -3281,35 +3280,18 @@ static ssize_t store_cursor_blink(struct device *device,
 	return count;
 }
 
-static struct device_attribute device_attrs[] = {
-	__ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
-	__ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
-	__ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
-	       store_cursor_blink),
-};
-
-static int fbcon_init_device(void)
-{
-	int i, error = 0;
+static DEVICE_ATTR_RW(cursor_blink);
+static DEVICE_ATTR_RW(rotate);
+static DEVICE_ATTR_WO(rotate_all);
 
-	fbcon_has_sysfs = 1;
-
-	for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
-		error = device_create_file(fbcon_device, &device_attrs[i]);
-
-		if (error)
-			break;
-	}
-
-	if (error) {
-		while (--i >= 0)
-			device_remove_file(fbcon_device, &device_attrs[i]);
-
-		fbcon_has_sysfs = 0;
-	}
+static struct attribute *fbcon_device_attrs[] = {
+	&dev_attr_cursor_blink.attr,
+	&dev_attr_rotate.attr,
+	&dev_attr_rotate_all.attr,
+	NULL
+};
 
-	return 0;
-}
+ATTRIBUTE_GROUPS(fbcon_device);
 
 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
 static void fbcon_register_existing_fbs(struct work_struct *work)
@@ -3367,16 +3349,16 @@ void __init fb_console_init(void)
 	int i;
 
 	console_lock();
-	fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
-				     "fbcon");
+	fbcon_device = device_create_with_groups(fb_class, NULL,
+						 MKDEV(0, 0), NULL,
+						 fbcon_device_groups, "fbcon");
 
 	if (IS_ERR(fbcon_device)) {
 		printk(KERN_WARNING "Unable to create device "
 		       "for fbcon; errno = %ld\n",
 		       PTR_ERR(fbcon_device));
 		fbcon_device = NULL;
-	} else
-		fbcon_init_device();
+	}
 
 	for (i = 0; i < MAX_NR_CONSOLES; i++)
 		con2fb_map[i] = -1;
@@ -3387,18 +3369,6 @@ void __init fb_console_init(void)
 
 #ifdef MODULE
 
-static void __exit fbcon_deinit_device(void)
-{
-	int i;
-
-	if (fbcon_has_sysfs) {
-		for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
-			device_remove_file(fbcon_device, &device_attrs[i]);
-
-		fbcon_has_sysfs = 0;
-	}
-}
-
 void __exit fb_console_exit(void)
 {
 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
@@ -3411,7 +3381,6 @@ void __exit fb_console_exit(void)
 #endif
 
 	console_lock();
-	fbcon_deinit_device();
 	device_destroy(fb_class, MKDEV(0, 0));
 
 	do_unregister_con_driver(&fb_con);