On 20.07.20 г. 4:42 ч., robbieko wrote:
> From: Robbie Ko <robbieko@xxxxxxxxxxxx>
>
> When locking pages for delalloc, we check if it's dirty and mapping still
> matches, if it does not match, we will return -EAGAIN and release all
> pages.
>
> Signed-off-by: Robbie Ko <robbieko@xxxxxxxxxxxx>
Reviewed-by: Nikolay Borisov <nborisov@xxxxxxxx>
> ---
> fs/btrfs/extent_io.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
> index 68c96057ad2d..22fc47f9c900 100644
> --- a/fs/btrfs/extent_io.c
> +++ b/fs/btrfs/extent_io.c
> @@ -1999,7 +1999,8 @@ static int __process_pages_contig(struct address_space *mapping,
> if (!PageDirty(pages[i]) ||
> pages[i]->mapping != mapping) {
> unlock_page(pages[i]);
> - put_page(pages[i]);
> + for (; i < ret; i++)
> + put_page(pages[i]);
> err = -EAGAIN;
> goto out;
> }
>
