2021-07-26 09:59:05

by David Howells

Subject: [PATCH] netfs: Fix READ/WRITE confusion when calling iov_iter_xarray()

Fix netfs_clear_unread() to pass READ to iov_iter_xarray() instead of WRITE
(the flag is about the operation accessing the buffer, not what sort of
access it is doing to the buffer).

Fixes: 3d3c95046742 ("netfs: Provide readahead and readpage netfs helpers")
Signed-off-by: David Howells <[email protected]>
cc: Jeff Layton <[email protected]>
cc: [email protected]
cc: [email protected]
cc: [email protected]
cc: [email protected]
cc: [email protected]
cc: [email protected]
cc: [email protected]
cc: [email protected]
---

fs/netfs/read_helper.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/netfs/read_helper.c b/fs/netfs/read_helper.c
index 0b6cd3b8734c..994ec22d4040 100644
--- a/fs/netfs/read_helper.c
+++ b/fs/netfs/read_helper.c
@@ -150,7 +150,7 @@ static void netfs_clear_unread(struct netfs_read_subrequest *subreq)
{
struct iov_iter iter;

- iov_iter_xarray(&iter, WRITE, &subreq->rreq->mapping->i_pages,
+ iov_iter_xarray(&iter, READ, &subreq->rreq->mapping->i_pages,
subreq->start + subreq->transferred,
subreq->len - subreq->transferred);
iov_iter_zero(iov_iter_count(&iter), &iter);

2021-08-13 13:57:26

by Jeff Layton

Subject: Re: [PATCH] netfs: Fix READ/WRITE confusion when calling iov_iter_xarray()

On Mon, 2021-07-26 at 10:58 +0100, David Howells wrote:
> Fix netfs_clear_unread() to pass READ to iov_iter_xarray() instead of WRITE
> (the flag is about the operation accessing the buffer, not what sort of
> access it is doing to the buffer).
>
> Fixes: 3d3c95046742 ("netfs: Provide readahead and readpage netfs helpers")
> Signed-off-by: David Howells <[email protected]>
> cc: Jeff Layton <[email protected]>
> cc: [email protected]
> cc: [email protected]
> cc: [email protected]
> cc: [email protected]
> cc: [email protected]
> cc: [email protected]
> cc: [email protected]
> cc: [email protected]
> ---
>
> fs/netfs/read_helper.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/netfs/read_helper.c b/fs/netfs/read_helper.c
> index 0b6cd3b8734c..994ec22d4040 100644
> --- a/fs/netfs/read_helper.c
> +++ b/fs/netfs/read_helper.c
> @@ -150,7 +150,7 @@ static void netfs_clear_unread(struct netfs_read_subrequest *subreq)
> {
> struct iov_iter iter;
>
> - iov_iter_xarray(&iter, WRITE, &subreq->rreq->mapping->i_pages,
> + iov_iter_xarray(&iter, READ, &subreq->rreq->mapping->i_pages,
> subreq->start + subreq->transferred,
> subreq->len - subreq->transferred);
> iov_iter_zero(iov_iter_count(&iter), &iter);
>
>

That's better!

Reviewed-by: Jeff Layton <[email protected]>