[PATCH v3 2/2] cmd: brcm: netXtreme commands

Roman Bacik roman.bacik at broadcom.com
Tue Oct 26 18:02:54 CEST 2021

On Tue, Oct 26, 2021 at 8:55 AM Marek Behún <kabel at kernel.org> wrote:
> On Tue, 26 Oct 2021 08:14:28 -0700
> Roman Bacik <roman.bacik at broadcom.com> wrote:
> > Hi Marek,
> >
> > We do not want this driver to be automatically probed. It is not needed
> > all the time and also slows down the boot time. We have stripped down
> > everything else to bare minimum.
> > Thanks,
> >
> > Roman
> Hi Roman,
> OK, that is reasonable, but not reasonable enough to introduce a new
> vendor specific command.
> Still NAK.
> So you have the bnxt_drv_probe method defined in the driver, but you
> don't set a pointer to it into the U_BOOT_DRIVER structure, and instead
> you call this method when "brcm probe" command is called.
> I think this introduction of another vendor specific command is wrong.
> If probing takes too much time and should be done only when the device
> is needed, there are 2 things you could do:
> - you can create new driver flag saying that the device should be
>   probeb only when needed, wire necessary code and add this flag to your
>   driver (this could get very complicated, though)
> - you can do minimum stuff in probe method, and move the stuff that
>   takes long time into bnxt_start(), which is called only when network
>   via this ethernet controller is requested for by U-Boot commands.

So renaming bnxt probe/remove to bnxt start/stop will do, right?

> Also, you're still doing
> +       if (env_get("ethaddr"))
> +               secondary = 1;

Why can't we access the env variable from our "bnxt start" method? Is
there a blacklist of env variables one must not access from a driver?

> in your driver, which is completely against DM.
> Marek

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