[PATCH v2 08/21] adfs: check for a directory write error with buffer_write_io_error()

[Chao Shi]

adfs_dir_sync() spots a failed write by testing BH_Req together with
!BH_Uptodate.  That relies on the write completion handler clearing
BH_Uptodate on error, which this series removes: a buffer whose write
failed still holds the data the filesystem asked to be written, so
declaring it not up to date is wrong and makes callers re-read it.

BH_Write_EIO says exactly what this code wants to know, and it implies
BH_Req, so the pair collapses into one test.

No behaviour change today - a failed write sets BH_Write_EIO and clears
BH_Uptodate together.  It stops being a no-op at the end of the series,
where the new test is the one that still works.

Acked-by: Weidong Zhu <weizhu@xxxxxxx>
Signed-off-by: Chao Shi <coshi036@xxxxxxxxx>
---
 fs/adfs/dir.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c
index 11afa9e157aa..b8cc6a697a05 100644
--- a/fs/adfs/dir.c
+++ b/fs/adfs/dir.c
@@ -191,7 +191,7 @@ static int adfs_dir_sync(struct adfs_dir *dir)
 	for (i = dir->nr_buffers - 1; i >= 0; i--) {
 		struct buffer_head *bh = dir->bhs[i];
 		sync_dirty_buffer(bh);
-		if (buffer_req(bh) && !buffer_uptodate(bh))
+		if (buffer_write_io_error(bh))
 			err = -EIO;
 	}
 
-- 
2.43.0