The quilt patch titled
Subject: fsdax: dax_unshare_iter() should return a valid length
has been removed from the -mm tree. Its filename was
fsdax-dax_unshare_iter-should-return-a-valid-length.patch
This patch was dropped because it was merged into the mm-hotfixes-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Shiyang Ruan <ruansy.fnst@xxxxxxxxxxx>
Subject: fsdax: dax_unshare_iter() should return a valid length
Date: Thu, 2 Feb 2023 12:33:47 +0000
The copy_mc_to_kernel() will return 0 if it executed successfully. Then
the return value should be set to the length it copied.
[akpm@xxxxxxxxxxxxxxxxxxxx: don't mess up `ret', per Matthew]
Link: https://lkml.kernel.org/r/1675341227-14-1-git-send-email-ruansy.fnst@xxxxxxxxxxx
Fixes: d984648e428b ("fsdax,xfs: port unshare to fsdax")
Signed-off-by: Shiyang Ruan <ruansy.fnst@xxxxxxxxxxx>
Cc: Darrick J. Wong <djwong@xxxxxxxxxx>
Cc: Alistair Popple <apopple@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/fs/dax.c~fsdax-dax_unshare_iter-should-return-a-valid-length
+++ a/fs/dax.c
@@ -1271,8 +1271,9 @@ static s64 dax_unshare_iter(struct iomap
if (ret < 0)
goto out_unlock;
- ret = copy_mc_to_kernel(daddr, saddr, length);
- if (ret)
+ if (copy_mc_to_kernel(daddr, saddr, length) == 0)
+ ret = length;
+ else
ret = -EIO;
out_unlock:
_
Patches currently in -mm which might be from ruansy.fnst@xxxxxxxxxxx are
