[linux-sunxi] [PATCH] drm/sun4i: Unbind components before releasing DRM and mem at master unbind

[Paul Kocialkowski]

Hi,

Le mardi 23 avril 2019 à 10:14 -0700, Chen-Yu Tsai a écrit :
> On Tue, Apr 23, 2019 at 10:06 AM Paul Kocialkowski
> <paul.kocialkowski at bootlin.com> wrote:
> > Hi,
> > 
> > Le vendredi 19 avril 2019 à 19:10 +0200, Paul Kocialkowski a écrit :
> > > Hi,
> > > 
> > > On Fri, 2019-04-19 at 09:02 -0700, Chen-Yu Tsai wrote:
> > > > On Fri, Apr 19, 2019 at 1:03 AM Paul Kocialkowski
> > > > <paul.kocialkowski at bootlin.com> wrote:
> > > > > Our components may still be using the DRM device driver (if only to
> > > > > access our driver's private data), so make sure to unbind them before
> > > > > the final drm_dev_put.
> > > > > 
> > > > > Also release our resserved memory adter unbind to match reverse
> > > > 
> > > > typos...
> > > 
> > > I'll probably spin up a v2 to fix them, they annoy me as well.
> > > 
> > > > > creation order.
> > > > > 
> > > > > Fixes: f5a9ed867c83 ("drm/sun4i: Fix component unbinding and component master deletion")
> > > > > Signed-off-by: Paul Kocialkowski <paul.kocialkowski at bootlin.com>
> > > > > ---
> > > > >  drivers/gpu/drm/sun4i/sun4i_drv.c | 5 +++--
> > > > >  1 file changed, 3 insertions(+), 2 deletions(-)
> > > > > 
> > > > > diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
> > > > > index 843b86661833..29258b404e54 100644
> > > > > --- a/drivers/gpu/drm/sun4i/sun4i_drv.c
> > > > > +++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
> > > > > @@ -149,10 +149,11 @@ static void sun4i_drv_unbind(struct device *dev)
> > > > >         drm_kms_helper_poll_fini(drm);
> > > > >         drm_atomic_helper_shutdown(drm);
> > > > >         drm_mode_config_cleanup(drm);
> > > > > -       of_reserved_mem_device_release(dev);
> > > > > -       drm_dev_put(drm);
> > > > > 
> > > > >         component_unbind_all(dev, NULL);
> > > > > +       of_reserved_mem_device_release(dev);
> > > > 
> > > > You should probably mention this change in the commit log as well.
> > > 
> > > That's what I meant with the line that has typos. Maybe I should make
> > > it slightly more explicit as:
> > > 
> > > Also released our reserved memory after component unbind instead of
> > > before to match reverse creation order.
> > > 
> > > What do you think?
> 
> Forgot to reply ...
> 
> Looking again, the original already made sense. I'm not sure what I
> was doing ...

I like the improved description better anyway so I'll go with that :)

> > > > Otherwise,
> > > > 
> > > > Reviewed-by: Chen-Yu Tsai <wens at csie.org>
> > > 
> > > Thanks for the review!
> > 
> > Unless you have objections at this point, I'll send out the patch with
> > your Reviewed-by soon to get the patch out ASAP.
> 
> Works for me. Thanks!

Great, thanks!

Cheers,

Paul

> ChenYu
> 
> > Cheers,
> > 
> > Paul
> > 
> > > Cheers,
> > > 
> > > Paul
> > > 
> > > > > +
> > > > > +       drm_dev_put(drm);
> > > > >  }
> > > > > 
> > > > >  static const struct component_master_ops sun4i_drv_master_ops = {
> > > > > --
> > > > > 2.21.0
> > > > > 
> > > > > --
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