Re: [PATCH v1 2/3] media: cedrus: Set the platform driver data earlier

[Nicolas Dufresne]

Le vendredi 19 août 2022 à 06:17 +0200, Jernej Škrabec a écrit :
> Dne četrtek, 18. avgust 2022 ob 22:33:07 CEST je Nicolas Dufresne napisal(a):
> > From: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
> > 
> > The cedrus_hw_resume() crashes with NULL deference on driver probe if
> > runtime PM is disabled because it uses platform data that hasn't been
> > set up yet. Fix this by setting the platform data earlier during probe.
> 
> Does it even work without PM? Maybe it would be better if Cedrus would select 
> PM in Kconfig.

I cannot comment myself on this, but it does not seem to invalidate this
Dmitry's fix.

> 
> Best regards,
> Jernej
> 
> > 
> > Cc: stable@xxxxxxxxxxxxxxx
> > Signed-off-by: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
> > Signed-off-by: Nicolas Dufresne <nicolas.dufresne@xxxxxxxxxxxxx>
> > ---
> >  drivers/staging/media/sunxi/cedrus/cedrus.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.c
> > b/drivers/staging/media/sunxi/cedrus/cedrus.c index
> > 960a0130cd620..55c54dfdc585c 100644
> > --- a/drivers/staging/media/sunxi/cedrus/cedrus.c
> > +++ b/drivers/staging/media/sunxi/cedrus/cedrus.c
> > @@ -448,6 +448,8 @@ static int cedrus_probe(struct platform_device *pdev)
> >  	if (!dev)
> >  		return -ENOMEM;
> > 
> > +	platform_set_drvdata(pdev, dev);
> > +
> >  	dev->vfd = cedrus_video_device;
> >  	dev->dev = &pdev->dev;
> >  	dev->pdev = pdev;
> > @@ -521,8 +523,6 @@ static int cedrus_probe(struct platform_device *pdev)
> >  		goto err_m2m_mc;
> >  	}
> > 
> > -	platform_set_drvdata(pdev, dev);
> > -
> >  	return 0;
> > 
> >  err_m2m_mc:
> 
> 
> 
>