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?
-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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