linux-kernel - Re: [PATCH v2 1/3] can: dev: replace can_priv::ctrlmode_static by can_get_static

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Date:   Mon, 25 Oct 2021 21:06:51 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Vincent MAILHOL <mailhol.vincent@...adoo.fr>
Cc:     linux-can <linux-can@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/3] can: dev: replace can_priv::ctrlmode_static by
 can_get_static_ctrlmode()

On 26.10.2021 02:22:36, Vincent MAILHOL wrote:
> Welcome back on the mailing list, hope you had some nice
> holidays!

Thanks was really nice, good weather, 1000km of cycling and hanging
around in Vienna. :D

> And also thanks a lot for your support over the last
> few months on my other series to introduce the TDC netlink
> interface :)

The pleasure is on my side, working with you!

> Le lun. 25 oct. 2021 à 03:30, Marc Kleine-Budde <mkl@...gutronix.de> a écrit :
> >
> > On 09.10.2021 22:13:02, Vincent Mailhol wrote:
> > > The statically enabled features of a CAN controller can be retrieved
> > > using below formula:
> > >
> > > | u32 ctrlmode_static = priv->ctrlmode & ~priv->ctrlmode_supported;
> > >
> > > As such, there is no need to store this information. This patch remove
> > > the field ctrlmode_static of struct can_priv and provides, in
> > > replacement, the inline function can_get_static_ctrlmode() which
> > > returns the same value.
> > >
> > > A condition sine qua non for this to work is that the controller
> > > static modes should never be set in can_priv::ctrlmode_supported. This
> > > is already the case for existing drivers, however, we added a warning
> > > message in can_set_static_ctrlmode() to check that.
> >
> > Please make the can_set_static_ctrlmode to return an error in case of a
> > problem. Adjust the drivers using the function is this patch, too.
> 
> I didn't do so initially because this is more a static
> configuration issue that should only occur during
> development. Nonetheless, what you suggest is really simple.
> 
> I will just split the patch in two: one of the setter and one for
> the getter and address your comments.

Fine with me. Most important thing is, that the kernel compiles after
each patch.

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
Embedded Linux                   | https://www.pengutronix.de  |
Vertretung West/Dortmund         | Phone: +49-231-2826-924     |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-5555 |

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