linux-kernel - Re: [PATCH] sh: Drop CONFIG_MTD_M25P80 in sh7757lcr

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Date:   Sat, 2 May 2020 19:05:40 +0800
From:   Bin Meng <bmeng.cn@...il.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Linux-sh list <linux-sh@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Bin Meng <bin.meng@...driver.com>
Subject: Re: [PATCH] sh: Drop CONFIG_MTD_M25P80 in sh7757lcr_defconfig

Hi Geert,

On Sat, May 2, 2020 at 6:09 PM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>
> Hi Bin,
>
> On Sat, May 2, 2020 at 6:27 AM Bin Meng <bmeng.cn@...il.com> wrote:
> > From: Bin Meng <bin.meng@...driver.com>
> >
> > Drop CONFIG_MTD_M25P80 that was removed in
> > commit b35b9a10362d ("mtd: spi-nor: Move m25p80 code in spi-nor.c")
> >
> > Signed-off-by: Bin Meng <bin.meng@...driver.com>
>
> Thanks for your patch!
>
> Blindly removing config options from defconfig files that haven't
> received much love for a while is IMHO not such a good idea, as it makes
> it harder to see what the affected platform needs, or needed.
>
> > --- a/arch/sh/configs/sh7757lcr_defconfig
> > +++ b/arch/sh/configs/sh7757lcr_defconfig
> > @@ -36,7 +36,6 @@ CONFIG_IPV6=y
> >  # CONFIG_FW_LOADER is not set
> >  CONFIG_MTD=y
> >  CONFIG_MTD_BLOCK=y
> > -CONFIG_MTD_M25P80=y
> >  CONFIG_BLK_DEV_RAM=y
> >  CONFIG_SCSI=y
> >  CONFIG_BLK_DEV_SD=y
>
> MTD_SPI_NOR became a dependency for MTD_M25P80 since commit
> 03e296f613affcc2671c1e86d8c25ecad867204e ("mtd: m25p80: use the SPI nor
> framework") and commit e43b20619bdb6c851dd7b49cbd15e52875a785d4 ("mtd:
> spi-nor: shorten Kconfig naming").  Hence CONFIG_MTD_SPI_NOR=y should be
> added to avoid breaking the platform's SPI FLASH support.
>
> Just removing CONFIG_MTD_M25P80=y from the defconfig makes this less
> visible for someone who wants to build a kernel for this platform using
> "make sh7757lcr_defconfig": it can no longer be seen that
> CONFIG_MTD_M25P80=y won't be present in the resulting .config file.
>

Thank you for the review! Sorry I missed that.

> I think the platform would be better served with a proper refresh of the
> defconfig file.

I am not sure if doing a defconfig refresh should be a separate patch.
I felt mixing the refresh with the real changes makes the code review
a little bit hard. I just sent v2 without the refresh. Please let me
know if it is okay.

Regards,
Bin