netdev - Re: [PATCH net 1/4] net: ethernet: fec: move GPR register offset and bit into DT

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Date:   Sat, 23 May 2020 11:55:30 +0200
From:   "Fuzzey, Martin" <martin.fuzzey@...wbird.group>
To:     Andy Duan <fugang.duan@....com>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH net 1/4] net: ethernet: fec: move GPR register offset and
 bit into DT

Hi Andy,

> Fixes: da722186f654(net: fec: set GPR bit on suspend by DT configuration)

Just a nitpick maybe but I don't really think this need as Fixes: tag.
That commit didn't actually *break* anything AFAIK.
It added WoL support for *some* SoCs that didn't have any in mainline
and didn't hurt the others.
Of course it turned out to be insufficient for the multiple FEC case
so this patch series is a welcome improvement.

>  struct fec_devinfo {
>         u32 quirks;
> -       u8 stop_gpr_reg;
> -       u8 stop_gpr_bit;
>  };

This structure has become redundant now that it only contains a single
u32 quirks field.
So we *could* go back to storing the quirks bitmask directly in
.driver_data as was done before.

It's a slight wastage to keep the, now unnecessary, indirection,
though the size impact is small
and it's only used at probe() time not on a hot path.

But switching back could be seen as code churn too...

I don't have a strong opinion on this, so just noting it to see what
others think.

Martin