On Tue, Apr 13, 2021 at 2:37 PM Daniel Vetter <daniel@xxxxxxxx> wrote:
>
> On Tue, Apr 13, 2021 at 8:02 PM Alex Deucher <alexdeucher@xxxxxxxxx> wrote:
> >
> > On Tue, Apr 13, 2021 at 1:05 PM Kai-Heng Feng
> > <kai.heng.feng@xxxxxxxxxxxxx> wrote:
> > >
> > > On some platforms like Hyper-V and RPi4 with UEFI firmware, efifb is not
> > > a PCI device.
> > >
> > > So make sure efifb_pci_dev is found before using it.
> > >
> > > Fixes: a6c0fd3d5a8b ("efifb: Ensure graphics device for efifb stays at PCI D0")
> > > BugLink: https://bugs.launchpad.net/bugs/1922403
> > > Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
> >
> > Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
>
> fbdev is in drm-misc, so maybe you can push this one too?
Yes, pushed. Thanks!
Alex
> -Daniel
>
> >
> > > ---
> > > drivers/video/fbdev/efifb.c | 6 ++++--
> > > 1 file changed, 4 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c
> > > index f58a545b3bf3..8ea8f079cde2 100644
> > > --- a/drivers/video/fbdev/efifb.c
> > > +++ b/drivers/video/fbdev/efifb.c
> > > @@ -575,7 +575,8 @@ static int efifb_probe(struct platform_device *dev)
> > > goto err_fb_dealoc;
> > > }
> > > fb_info(info, "%s frame buffer device\n", info->fix.id);
> > > - pm_runtime_get_sync(&efifb_pci_dev->dev);
> > > + if (efifb_pci_dev)
> > > + pm_runtime_get_sync(&efifb_pci_dev->dev);
> > > return 0;
> > >
> > > err_fb_dealoc:
> > > @@ -602,7 +603,8 @@ static int efifb_remove(struct platform_device *pdev)
> > > unregister_framebuffer(info);
> > > sysfs_remove_groups(&pdev->dev.kobj, efifb_groups);
> > > framebuffer_release(info);
> > > - pm_runtime_put(&efifb_pci_dev->dev);
> > > + if (efifb_pci_dev)
> > > + pm_runtime_put(&efifb_pci_dev->dev);
> > >
> > > return 0;
> > > }
> > > --
> > > 2.30.2
> > >
> > > _______________________________________________
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>
>
>
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch
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