linux-kernel - Re: [PATCH v2] virtio_net/vringh: add "else { }" according coding style

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Date:   Thu, 24 Jun 2021 12:02:49 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Cai Huoqing <caihuoqing@...du.com>, mst@...hat.com,
        davem@...emloft.net, kuba@...nel.org
Cc:     virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH v2] virtio_net/vringh: add "else { }" according coding
 style


在 2021/6/24 上午9:17, Cai Huoqing 写道:
> coding-style.rst shows that:
>          if (condition) {
>                  do_this();
>                  do_that();
>          } else {
>                  otherwise();
>          }


So git grep told me there're at least 28 similar "issues" in 
drivers/virito. And there will be a lot in the other part of the kernel

I think it's not worth to bother. We can start to work on something that 
is really interesting.

E.g we had the plan to convert to use iov iterator instead of using a 
vringh specific iov "iterator" implementation. Do you want to do that?

Thanks


>
> Signed-off-by: Cai Huoqing <caihuoqing@...du.com>
> ---
>   drivers/net/virtio_net.c | 3 ++-
>   drivers/vhost/vringh.c   | 3 ++-
>   2 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index 21ff7b9e49c2..7cd062cb468e 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -314,8 +314,9 @@ static struct page *get_a_page(struct receive_queue *rq, gfp_t gfp_mask)
>                  rq->pages = (struct page *)p->private;
>                  /* clear private here, it is used to chain pages */
>                  p->private = 0;
> -       } else
> +       } else {
>                  p = alloc_page(gfp_mask);
> +       }
>          return p;
>   }
>
> diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c
> index 4af8fa259d65..79542cad1072 100644
> --- a/drivers/vhost/vringh.c
> +++ b/drivers/vhost/vringh.c
> @@ -454,8 +454,9 @@ static inline int __vringh_complete(struct vringh *vrh,
>                  if (!err)
>                          err = putused(vrh, &used_ring->ring[0], used + part,
>                                        num_used - part);
> -       } else
> +       } else {
>                  err = putused(vrh, &used_ring->ring[off], used, num_used);
> +       }
>
>          if (err) {
>                  vringh_bad("Failed to write %u used entries %u at %p",
> --
> 2.17.1
>