On Thu, Nov 07, 2019 at 12:37:22PM -0800, Matt Roper wrote: > If INTEL_DISPLAY_ENABLED is false, then the modesetting resources were > never initialized. Userspace may still call DRM_IOCTL_MODE_CREATE_DUMB > which will eventually lead i915_gem_dumb_create() to try to dereference > a non-existent pipe A primary plane while figuring out a proper pitch. > > We could force dumb buffer creation to fail in cases where display isn't > enabled (since there isn't really a definition of a "suitable for > scanout" buffer in that case), but it's easier (and probably less > invasive to IGT tests) to just drop the attempt to align to plane max > stride in cases where the display isn't enabled. I just pushed my earlier patch which does it the other way around. But yeah, we should perhaps just reject the entire thing. > > Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx> > Cc: Jani Nikula <jani.nikula@xxxxxxxxx> > Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx> > --- > drivers/gpu/drm/i915/i915_gem.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c > index 143a8952b736..f022a17328b0 100644 > --- a/drivers/gpu/drm/i915/i915_gem.c > +++ b/drivers/gpu/drm/i915/i915_gem.c > @@ -229,7 +229,8 @@ i915_gem_dumb_create(struct drm_file *file, > args->pitch = ALIGN(args->width * cpp, 64); > > /* align stride to page size so that we can remap */ > - if (args->pitch > intel_plane_fb_max_stride(to_i915(dev), format, > + if (INTEL_DISPLAY_ENABLED(to_i915(dev)) && > + args->pitch > intel_plane_fb_max_stride(to_i915(dev), format, > DRM_FORMAT_MOD_LINEAR)) > args->pitch = ALIGN(args->pitch, 4096); > > -- > 2.21.0 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Ville Syrjälä Intel _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
