FROMGIT: f2fs: decrease maximum flush retry count in f2fs_enable_checkpoint()

It's rare case that sync_inodes_sb() always skips to flush some drity
datas, so it's enough to give extra three more chances to flush data.

Bug: 477022593
Bug: 493380797
Bug: 495273251
(cherry picked from commit 6bb9010f78d7f0ff0e4a17b1be951e76d96757a5
https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev)
Link: https://lore.kernel.org/linux-f2fs-devel/20260121051404.2056730-1-chao@kernel.org
Change-Id: I8cd38e6c1e1473df65c49fd2f47c25c79fd57221
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
(cherry picked from commit 6bb9010f78d7f0ff0e4a17b1be951e76d96757a5)
[Chao: fix code conflict]
Signed-off-by: Chao Yu <chao@kernel.org>

fs/f2fs/f2fs.h

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index aab31a5..0b0bb12 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -606,6 +606,8 @@ enum {
 
 #define DEFAULT_RETRY_IO_COUNT	8	/* maximum retry read IO or flush count */
 
+#define MAX_FLUSH_RETRY_COUNT	3	/* maximum flush retry count in f2fs_enable_checkpoint() */
+
 /* congestion wait timeout value, default: 20ms */
 #define	DEFAULT_IO_TIMEOUT	(msecs_to_jiffies(20))
 

fs/f2fs/super.c

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index c6231a9..112154e 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -2360,7 +2360,7 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
 
 static int f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
 {
-	int retry = DEFAULT_RETRY_IO_COUNT;
+	int retry = MAX_FLUSH_RETRY_COUNT;
 	long long start, writeback, end;
 	int ret;
 	long long skipped_write, dirty_data;