| Message ID | 1675388906-50-1-git-send-email-ruansy.fnst@fujitsu.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 388bc034d91d480efa88abc5c8d6e6c8a878b1ab |
| Headers | show |
| Series | [v2] fsdax: dax_unshare_iter() should return a valid length | expand |
diff --git a/fs/dax.c b/fs/dax.c index c48a3a93ab29..3e457a16c7d1 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -1271,8 +1271,9 @@ static s64 dax_unshare_iter(struct iomap_iter *iter) 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:
The copy_mc_to_kernel() will return 0 if it executed successfully. Then the return value should be set to the length it copied. Fixes: d984648e428b ("fsdax,xfs: port unshare to fsdax") Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com> --- fs/dax.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)