From: Chi Zhiling <chizhiling@kylinos.cn>
Date: Wed, 14 Jan 2026 12:12:39 +0000 (+0800)
Subject: exfat: improve exfat_count_num_clusters
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=06805f4c57840c6957b1c2064d3b453e66e943ab;p=thirdparty%2Fkernel%2Fstable.git

exfat: improve exfat_count_num_clusters

Since exfat_ent_get support cache buffer head, let's apply it to
exfat_count_num_clusters.

Signed-off-by: Chi Zhiling <chizhiling@kylinos.cn>
Reviewed-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
---

diff --git a/fs/exfat/fatent.c b/fs/exfat/fatent.c
index 679688cfea01..f060eab2f2f2 100644
--- a/fs/exfat/fatent.c
+++ b/fs/exfat/fatent.c
@@ -484,6 +484,7 @@ int exfat_count_num_clusters(struct super_block *sb,
 	unsigned int i, count;
 	unsigned int clu;
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
+	struct buffer_head *bh = NULL;
 
 	if (!p_chain->dir || p_chain->dir == EXFAT_EOF_CLUSTER) {
 		*ret_count = 0;
@@ -499,12 +500,13 @@ int exfat_count_num_clusters(struct super_block *sb,
 	count = 0;
 	for (i = EXFAT_FIRST_CLUSTER; i < sbi->num_clusters; i++) {
 		count++;
-		if (exfat_ent_get(sb, clu, &clu, NULL))
+		if (exfat_ent_get(sb, clu, &clu, &bh))
 			return -EIO;
 		if (clu == EXFAT_EOF_CLUSTER)
 			break;
 	}
 
+	brelse(bh);
 	*ret_count = count;
 
 	/*