linux-kernel - Re: [PATCH] drivers: fpga: Specify HAS_IOMEM dependency for FPGA

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Date:   Fri, 20 Nov 2020 13:48:47 -0800
From:   Moritz Fischer <mdf@...nel.org>
To:     Xu Yilun <yilun.xu@...el.com>
Cc:     David Gow <davidgow@...gle.com>, Moritz Fischer <mdf@...nel.org>,
        Tom Rix <trix@...hat.com>, linux-fpga@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-um <linux-um@...ts.infradead.org>,
        Brendan Higgins <brendanhiggins@...gle.com>
Subject: Re: [PATCH] drivers: fpga: Specify HAS_IOMEM dependency for FPGA_DFL

Hi David,

On Fri, Nov 20, 2020 at 03:40:13PM +0800, Xu Yilun wrote:
> On Fri, Nov 20, 2020 at 03:30:35PM +0800, David Gow wrote:
> > On Fri, Nov 20, 2020 at 2:27 PM Moritz Fischer <mdf@...nel.org> wrote:
> > >
> > > Hi David,
> > >
> > > On Thu, Nov 19, 2020 at 12:22:09AM -0800, David Gow wrote:
> > > > Because dfl.c uses the 'devm_ioremap', 'devm_iounmap',
> > > > 'devm_ioremap_resource', and 'devm_platform_ioremap_resource'
> > > > functions, it should depend on HAS_IOMEM.
> > > >
> > > > This fixes make allyesconfig under UML (ARCH=um), which doesn't provide
> > > > HAS_IOMEM.
> > > >
> > > > Signed-off-by: David Gow <davidgow@...gle.com>
> > > > ---
> > > >  drivers/fpga/Kconfig | 1 +
> > > >  1 file changed, 1 insertion(+)
> > > >
> > > > diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
> > > > index 7cd5a29fc437..5645226ca3ce 100644
> > > > --- a/drivers/fpga/Kconfig
> > > > +++ b/drivers/fpga/Kconfig
> > > > @@ -142,6 +142,7 @@ config FPGA_DFL
> > > >       tristate "FPGA Device Feature List (DFL) support"
> > > >       select FPGA_BRIDGE
> > > >       select FPGA_REGION
> > > > +     depends on HAS_IOMEM
> > > >       help
> > > >         Device Feature List (DFL) defines a feature list structure that
> > > >         creates a linked list of feature headers within the MMIO space
> > > > --
> > > > 2.29.2.454.gaff20da3a2-goog
> > > >
> > > Do you think we can add a Fixes: tag for this?
> > 
> > Sure. I think it should be:
> > 
> > Fixes: 543be3d ("fpga: add device feature list support")
> 
> I think it should be:
> 
> Fixes: 89eb35e810a8 ("fpga: dfl: map feature mmio resources in their own feature drivers")
I think so, yes.

Can you resend?

Cheers