exfat: eliminate dead code in exfat_find()

The exfat_find_dir_entry() called by exfat_find() doesn't return -EEXIST.
Therefore, the root-dir information setting is never executed.
Signed-off-by: Tetsuhiro Kohada <kohada.t2@gmail.com>
Acked-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>

fs/exfat/dir.c

@@ -911,7 +911,6 @@ enum {
 /*
  * return values:
  *   >= 0	: return dir entiry position with the name in dir
- *   -EEXIST	: (root dir, ".") it is the root dir itself
  *   -ENOENT	: entry with the name does not exist
  *   -EIO	: I/O error
  */

fs/exfat/namei.c

@@ -604,6 +604,8 @@ static int exfat_find(struct inode *dir, struct qstr *qname,
 	struct super_block *sb = dir->i_sb;
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
 	struct exfat_inode_info *ei = EXFAT_I(dir);
+	struct exfat_dentry *ep, *ep2;
+	struct exfat_entry_set_cache *es;
 
 	if (qname->len == 0)
 		return -ENOENT;
@@ -629,39 +631,13 @@ static int exfat_find(struct inode *dir, struct qstr *qname,
 	dentry = exfat_find_dir_entry(sb, ei, &cdir, &uni_name,
 			num_entries, TYPE_ALL);
 
-	if ((dentry < 0) && (dentry != -EEXIST))
+	if (dentry < 0)
 		return dentry; /* -error value */
 
 	memcpy(&info->dir, &cdir.dir, sizeof(struct exfat_chain));
 	info->entry = dentry;
 	info->num_subdirs = 0;
 
-	/* root directory itself */
-	if (unlikely(dentry == -EEXIST)) {
-		int num_clu = 0;
-
-		info->type = TYPE_DIR;
-		info->attr = ATTR_SUBDIR;
-		info->flags = ALLOC_FAT_CHAIN;
-		info->start_clu = sbi->root_dir;
-		memset(&info->crtime, 0, sizeof(info->crtime));
-		memset(&info->mtime, 0, sizeof(info->mtime));
-		memset(&info->atime, 0, sizeof(info->atime));
-
-		exfat_chain_set(&cdir, sbi->root_dir, 0, ALLOC_FAT_CHAIN);
-		if (exfat_count_num_clusters(sb, &cdir, &num_clu))
-			return -EIO;
-		info->size = num_clu << sbi->cluster_size_bits;
-
-		count = exfat_count_dir_entries(sb, &cdir);
-		if (count < 0)
-			return -EIO;
-
-		info->num_subdirs = count;
-	} else {
-		struct exfat_dentry *ep, *ep2;
-		struct exfat_entry_set_cache *es;
-
 	es = exfat_get_dentry_set(sb, &cdir, dentry, ES_2_ENTRIES);
 	if (!es)
 		return -EIO;
@@ -680,14 +656,6 @@ static int exfat_find(struct inode *dir, struct qstr *qname,
 			le32_to_cpu(ep2->dentry.stream.start_clu);
 	}
 
-		if (ei->start_clu == EXFAT_FREE_CLUSTER) {
-			exfat_fs_error(sb,
-				"non-zero size file starts with zero cluster (size : %llu, p_dir : %u, entry : 0x%08x)",
-				i_size_read(dir), ei->dir.dir, ei->entry);
-			exfat_free_dentry_set(es, false);
-			return -EIO;
-		}
-
 	exfat_get_entry_time(sbi, &info->crtime,
 			     ep->dentry.file.create_tz,
 			     ep->dentry.file.create_time,
@@ -705,6 +673,13 @@ static int exfat_find(struct inode *dir, struct qstr *qname,
 			     0);
 	exfat_free_dentry_set(es, false);
 
+	if (ei->start_clu == EXFAT_FREE_CLUSTER) {
+		exfat_fs_error(sb,
+			       "non-zero size file starts with zero cluster (size : %llu, p_dir : %u, entry : 0x%08x)",
+			       i_size_read(dir), ei->dir.dir, ei->entry);
+		return -EIO;
+	}
+
 	if (info->type == TYPE_DIR) {
 		exfat_chain_set(&cdir, info->start_clu,
 				EXFAT_B_TO_CLU(info->size, sbi), info->flags);
@@ -714,7 +689,6 @@ static int exfat_find(struct inode *dir, struct qstr *qname,
 
 		info->num_subdirs = count + EXFAT_MIN_SUBDIR;
 	}
-	}
 	return 0;
 }