linux-kernel - Re: [RFC PATCH v2 1/2] can: virtio: Initial virtio CAN driver.

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Message-ID: <CAMZ6RqK1g5GKTZWQA_BpLNq5uR29sBUwAr0VQCCqkGwW9SV75g@mail.gmail.com>
Date:   Sat, 5 Nov 2022 19:11:26 +0900
From:   Vincent Mailhol <vincent.mailhol@...il.com>
To:     Harald Mommer <Harald.Mommer@...nsynergy.com>
Cc:     virtio-dev@...ts.oasis-open.org, linux-can@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Wolfgang Grandegger <wg@...ndegger.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Dariusz Stojaczyk <Dariusz.Stojaczyk@...nsynergy.com>,
        Damir Shaikhutdinov <Damir.Shaikhutdinov@...nsynergy.com>
Subject: Re: [RFC PATCH v2 1/2] can: virtio: Initial virtio CAN driver.

On Sat. 5 Nov. 2022 at 18:11, Vincent Mailhol <vincent.mailhol@...il.com> wrote:
> On Sat. 5 Nov. 2022 at 02:29, Harald Mommer <Harald.Mommer@...nsynergy.com> wrote:
> > +/* CAN flags to determine type of CAN Id */
> > +#define VIRTIO_CAN_FLAGS_EXTENDED       0x8000u
> > +#define VIRTIO_CAN_FLAGS_FD             0x4000u
> > +#define VIRTIO_CAN_FLAGS_RTR            0x2000u
>
> I recommend the use of the BIT() macro to declare flags.

I just remembered that the BIT() macro is not meant to be used for
UAPI. Please ignore this particular comment.

> Please order those in ascending order.
> Also, what is the reason to start from BIT(9) (0x200)?

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