diff -drupN a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
--- a/fs/fat/namei_vfat.c	2018-08-06 17:23:04.000000000 +0300
+++ b/fs/fat/namei_vfat.c	2022-06-12 05:28:14.000000000 +0300
@@ -19,6 +19,8 @@
 #include <linux/ctype.h>
 #include <linux/slab.h>
 #include <linux/namei.h>
+#include <linux/fs.h>
+#include <linux/genhd.h>
 #include "fat.h"
 
 static inline unsigned long vfat_d_version(struct dentry *dentry)
@@ -1077,11 +1079,71 @@ static struct dentry *vfat_mount(struct
 	return mount_bdev(fs_type, flags, dev_name, data, vfat_fill_super);
 }
 
+#ifdef CONFIG_FAT_READ_FAT_DIR_SUNXI
+void sunxi_vfat_kill_block_super(struct super_block *sb)
+{
+	int i;
+	struct msdos_sb_info *sbi = sb->s_fs_info;
+	struct buffer_head *fat_bh;
+	struct buffer_head *dir_bh;
+	struct buffer_head *fsinfo_bh;
+
+
+/*
+	printk("%s,%d,na %s\n",__FUNCTION__, __LINE__, sb->s_bdev->bd_disk->disk_name);
+	if(strncmp(sb->s_bdev->bd_disk->disk_name, "mmcblk0", 7) != 0)
+		goto out;
+*/
+	if (!sbi) {
+		printk("no sbi\n");
+		goto out;
+	}
+	printk("kill:fat start %ld,fat len %ld\n", sbi->fat_start, sbi->fat_length);
+	for (i = sbi->fat_start; i < (sbi->fat_start+sbi->fat_length); i++) {
+		fat_bh = __find_get_block(sb->s_bdev, i, sb->s_blocksize);
+		if (!fat_bh) {
+			//fat_msg(sb, KERN_WARNING, "kill free:%s,%d can't find fat bh %d\n", __FUNCTION__, __LINE__ , i);
+			continue;
+		}
+
+		brelse(fat_bh);
+		brelse(fat_bh);
+	}
+	printk("Relase fat\n");
+
+	for (i = sbi->dir_start; i <= (sbi->dir_start + 0x1ff); i++) {
+		dir_bh = __find_get_block(sb->s_bdev, i, sb->s_blocksize);
+		if (!dir_bh) {
+			//fat_msg(sb, KERN_WARNING, "kill free:%s,%d can't find fat dir bh %d\n", __FUNCTION__, __LINE__, i);
+			continue;
+		}
+
+		brelse(dir_bh);
+		brelse(dir_bh);
+	}
+	printk("Release fat dir\n");
+
+	fsinfo_bh = __find_get_block(sb->s_bdev, 1, sb->s_blocksize);
+	if (fsinfo_bh) {
+		brelse(fsinfo_bh);
+		brelse(fsinfo_bh);
+	}
+	printk("Release fsinfo\n");
+
+out:
+	kill_block_super(sb);
+}
+#endif
+
 static struct file_system_type vfat_fs_type = {
 	.owner		= THIS_MODULE,
 	.name		= "vfat",
 	.mount		= vfat_mount,
+#ifdef CONFIG_FAT_READ_FAT_DIR_SUNXI
+	.kill_sb	= sunxi_vfat_kill_block_super,
+#else
 	.kill_sb	= kill_block_super,
+#endif
 	.fs_flags	= FS_REQUIRES_DEV,
 };
 MODULE_ALIAS_FS("vfat");