Re: [PATCH v5 1/4] md: add support for REQ_NOWAIT

[Song Liu <song@xxxxxxxxxx>]

On Tue, Dec 14, 2021 at 10:09 PM Vishal Verma <vverma@xxxxxxxxxxxxxxxx> wrote:
>
[...]
>
> Signed-off-by: Vishal Verma <vverma@xxxxxxxxxxxxxxxx>
> ---
>  drivers/md/md.c | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
>
> diff --git a/drivers/md/md.c b/drivers/md/md.c
> index 7fbf6f0ac01b..5b4c28e0e1db 100644
> --- a/drivers/md/md.c
> +++ b/drivers/md/md.c
> @@ -419,6 +419,12 @@ void md_handle_request(struct mddev *mddev, struct bio *bio)
>         if (is_suspended(mddev, bio)) {
>                 DEFINE_WAIT(__wait);
>                 for (;;) {
> +                       /* Bail out if REQ_NOWAIT is set for the bio */
> +                       if (bio->bi_opf & REQ_NOWAIT) {
> +                               rcu_read_unlock();
> +                               bio_wouldblock_error(bio);
> +                               return;
> +                       }

I moved this part to before the for (;;) loop. And applied to md-next.

Thanks,
Song