linux-ext4 - [PATCHv2] ext2: Fix ki_pos update for DIO buffered-io fallback case

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Date: Wed, 22 Nov 2023 14:32:15 +0530
From: "Ritesh Harjani (IBM)" <ritesh.list@...il.com>
To: linux-ext4@...r.kernel.org
Cc: Jan Kara <jack@...e.cz>,
	linux-fsdevel@...r.kernel.org,
	"Ritesh Harjani (IBM)" <ritesh.list@...il.com>,
	stable@...r.kernel.org,
	Christoph Hellwig <hch@....de>
Subject: [PATCHv2] ext2: Fix ki_pos update for DIO buffered-io fallback case

Commit "filemap: update ki_pos in generic_perform_write", made updating
of ki_pos into common code in generic_perform_write() function.
This also causes generic/091 to fail.
This happened due to an in-flight collision with:
fb5de4358e1a ("ext2: Move direct-io to use iomap"). I have chosen fixes tag
based on which commit got landed later to upstream kernel.

Fixes: 182c25e9c157 ("filemap: update ki_pos in generic_perform_write")
Cc: stable@...r.kernel.org
Reviewed-by: Christoph Hellwig <hch@....de>
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@...il.com>
---
 fs/ext2/file.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index 1039e5bf90af..4ddc36f4dbd4 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -258,7 +258,6 @@ static ssize_t ext2_dio_write_iter(struct kiocb *iocb, struct iov_iter *from)
 			goto out_unlock;
 		}
 
-		iocb->ki_pos += status;
 		ret += status;
 		endbyte = pos + status - 1;
 		ret2 = filemap_write_and_wait_range(inode->i_mapping, pos,
-- 
2.41.0