[PATCH] f2fs: make fault injection covering __submit_flush_wait()

[Chao Yu]

This patch changes to allow failure of f2fs_bio_alloc() in
__submit_flush_wait(), which can simulate flush error in checkpoint()
for covering more error paths.

Signed-off-by: Chao Yu <yuch...@huawei.com>
---
 fs/f2fs/segment.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 1334903b97f5..f454af871d5b 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -561,9 +561,13 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
 static int __submit_flush_wait(struct f2fs_sb_info *sbi,
                                struct block_device *bdev)
 {
-       struct bio *bio = f2fs_bio_alloc(sbi, 0, true);
+       struct bio *bio;
        int ret;
 
+       bio = f2fs_bio_alloc(sbi, 0, false);
+       if (!bio)
+               return -ENOMEM;
+
        bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH;
        bio_set_dev(bio, bdev);
        ret = submit_bio_wait(bio);
-- 
2.18.0.rc1