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Date:   Thu, 4 Nov 2021 09:10:19 -0500
From:   Tyler Hicks <tyhicks@linux.microsoft.com>
To:     Robert Marko <robert.marko@sartura.hr>,
        Lee Jones <lee.jones@linaro.org>
Cc:     Alistair Francis <alistair@alistair23.me>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mfd: simple-mfd-i2c: Fix linker error due to new
 mfd-core dependency
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On 2021-11-04 15:00:40, Robert Marko wrote:
> On Thu, Nov 4, 2021 at 2:53 PM Tyler Hicks <tyhicks@linux.microsoft.com> wrote:
> >
> > On 2021-11-04 08:24:28, Lee Jones wrote:
> > > On Wed, 03 Nov 2021, Tyler Hicks wrote:
> > >
> > > > Select CONFIG_MFD_CORE from CONFIG_MFD_SIMPLE_MFD_I2C, now that
> > > > simple-mfd-i2c.c calls devm_mfd_add_devices(), to fix the following
> > > > linker error:
> > > >
> > > >  ld: drivers/mfd/simple-mfd-i2c.o: in function `simple_mfd_i2c_probe':
> > > >  simple-mfd-i2c.c:(.text+0x62): undefined reference to `devm_mfd_add_devices'
> > > >  make: *** [Makefile:1187: vmlinux] Error 1
> > > >
> > > > Fixes: c753ea31781a ("mfd: simple-mfd-i2c: Add support for registering devices via MFD cells")
> > > > Cc: stable@vger.kernel.org # 5.15.x
> > > > Signed-off-by: Tyler Hicks <tyhicks@linux.microsoft.com>
> > > > ---
> > > >  drivers/mfd/Kconfig | 1 +
> > > >  1 file changed, 1 insertion(+)
> > >
> > > Looks like the same change that has already been applied.
> > >
> > > Could you rebase on top of the MFD tree please?
> >
> > Ah, that commit wasn't in for-mfd-next when I wrote up this patch
> > yesterday.
> >
> > I think that the Fixes line in that patch is wrong as I didn't see this
> > issue in 5.10 and reverting c753ea31781a fixes the build failure.
> 
> Hi Tyler, I would agree with you on the fixes tag.
> I messed that one up, c753ea31781a is the correct one.

It is probably better to overshoot than undershoot with Fixes tags. :)

Lee, I don't know if you rebase that branch (I doubt it) but if you do
to fix up the Fixes tag, please also add an explicit Cc: stable tag
since this affects the new LTS release.

Tyler

> 
> Regards,
> Robert
> >
> > Tyler
> >
> > >
> > > --
> > > Lee Jones [李琼斯]
> > > Senior Technical Lead - Developer Services
> > > Linaro.org │ Open source software for Arm SoCs
> > > Follow Linaro: Facebook | Twitter | Blog
> > >
> 
> 
> 
> -- 
> Robert Marko
> Staff Embedded Linux Engineer
> Sartura Ltd.
> Lendavska ulica 16a
> 10000 Zagreb, Croatia
> Email: robert.marko@sartura.hr
> Web: www.sartura.hr
>