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

Message ID 20170704151833.17304-12-daniel.vetter@ffwll.ch
State New
Headers show

Commit Message

Daniel Vetter July 4, 2017, 3:18 p.m. UTC
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@linux.intel.com>
Reported-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Maarten Lankhorst July 5, 2017, 10:08 a.m. UTC | #1
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@linux.intel.com>
> Reported-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Signed-off-by: Daniel Vetter <daniel.vetter@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?
Daniel Vetter July 5, 2017, 8:17 p.m. UTC | #2
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@linux.intel.com>
> > Reported-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> > Signed-off-by: Daniel Vetter <daniel.vetter@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

Patch
diff mbox

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 ",