linux-kernel - Re: [PATCH] drm/amdgpu: Fix build with missing pm_suspend_target

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Date:   Tue, 24 Aug 2021 11:57:19 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     "Lazar, Lijo" <lijo.lazar@....com>
Cc:     Borislav Petkov <bp@...en8.de>,
        Alex Deucher <alexander.deucher@....com>,
        Pratik Vishwakarma <Pratik.Vishwakarma@....com>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/amdgpu: Fix build with missing pm_suspend_target_state
 module export

Applied.  Thanks!

Alex

On Tue, Aug 24, 2021 at 11:16 AM Lazar, Lijo <lijo.lazar@....com> wrote:
>
>
>
> On 8/24/2021 3:12 PM, Borislav Petkov wrote:
> > From: Borislav Petkov <bp@...e.de>
> >
> > Building a randconfig here triggered:
> >
> >    ERROR: modpost: "pm_suspend_target_state" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> >
> > because the module export of that symbol happens in
> > kernel/power/suspend.c which is enabled with CONFIG_SUSPEND.
> >
> > The ifdef guards in amdgpu_acpi_is_s0ix_supported(), however, test for
> > CONFIG_PM_SLEEP which is defined like this:
> >
> >    config PM_SLEEP
> >            def_bool y
> >            depends on SUSPEND || HIBERNATE_CALLBACKS
> >
> Missed this altogether!
>
> Reviewed-by: Lijo Lazar <lijo.lazar@....com>
>
> Thanks,
> Lijo
>
> > and that randconfig has:
> >
> >    # CONFIG_SUSPEND is not set
> >    CONFIG_HIBERNATE_CALLBACKS=y
> >
> > leading to the module export missing.
> >
> > Change the ifdeffery to depend directly on CONFIG_SUSPEND.
> >
> > Fixes: 5706cb3c910c ("drm/amdgpu: fix checking pmops when PM_SLEEP is not enabled")
> > Signed-off-by: Borislav Petkov <bp@...e.de>
> > Link: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flkml.kernel.org%2Fr%2FYSP6Lv53QV0cOAsd%40zn.tnic&amp;data=04%7C01%7CLijo.Lazar%40amd.com%7C71b6769cdd574a05b32b08d966e37525%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637653949420453962%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=ai%2B95gtZz0r0pXYaUkG97tiuaiykEy8%2FB%2FtmHP3W4Zs%3D&amp;reserved=0
> > ---
> >   drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
> > index 4137e848f6a2..a9ce3b20d371 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
> > @@ -1040,7 +1040,7 @@ void amdgpu_acpi_detect(void)
> >    */
> >   bool amdgpu_acpi_is_s0ix_supported(struct amdgpu_device *adev)
> >   {
> > -#if IS_ENABLED(CONFIG_AMD_PMC) && IS_ENABLED(CONFIG_PM_SLEEP)
> > +#if IS_ENABLED(CONFIG_AMD_PMC) && IS_ENABLED(CONFIG_SUSPEND)
> >       if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) {
> >               if (adev->flags & AMD_IS_APU)
> >                       return pm_suspend_target_state == PM_SUSPEND_TO_IDLE;
> >