[PATCH 11/13] drm/i915: Protect against deferred fbdev setup

[Daniel Vetter]

On Wed, Jul 05, 2017 at 12:08:15PM +0200, Maarten Lankhorst wrote:
> Op 04-07-17 om 17:18 schreef Daniel Vetter:
> > We could probably hit this already with our current async fbdev init,
> > but it's much easier to hit this with the new deferred fbdev setup
> > that I'm working on polishing.
> >
> > Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> > Reported-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> > Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> > ---
> >  drivers/gpu/drm/i915/i915_debugfs.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> > index 580bd4f4a49e..a4224566ebca 100644
> > --- a/drivers/gpu/drm/i915/i915_debugfs.c
> > +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> > @@ -1931,7 +1931,7 @@ static int i915_gem_framebuffer_info(struct seq_file *m, void *data)
> >  		return ret;
> >  
> >  #ifdef CONFIG_DRM_FBDEV_EMULATION
> > -	if (dev_priv->fbdev) {
> > +	if (dev_priv->fbdev && dev_priv->fbdev->helper.fb) {
> >  		fbdev_fb = to_intel_framebuffer(dev_priv->fbdev->helper.fb);
> >  
> >  		seq_printf(m, "fbcon size: %d x %d, depth %d, %d bpp, modifier 0x%llx, refcount %d, obj ",
> 
> Since patch 10/13 makes it way more likely we don't allocate a FB, this patch should be commited before it?

Yeah I think I need to reshuffle, and add the patch to remove the
ifbdev->vma check in output_changed too. I think I'll merge patches 1-9
tomorrow meanwhile.

Thanks a lot for your review.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch