From: Clint Taylor <clinton.a.tay...@intel.com> Add protections to prevent NULL de-reference for a couple variables used in skl_check_pipe_max_pixel_clock to prevent GP exception from occurring during some IGT tests.
References: https://bugs.freedesktop.org/show_bug.cgi?id=109084 Cc: Rodrigo Vivi <rodrigo.v...@intel.com> Cc: Martin Peres <martin.pe...@linux.intel.com> Signed-off-by: Clint Taylor <clinton.a.tay...@intel.com> --- drivers/gpu/drm/i915/intel_display.c | 4 ++++ drivers/gpu/drm/i915/intel_pm.c | 3 +++ 2 files changed, 7 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 3bd40a4a6739..945861cef520 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -11377,6 +11377,10 @@ static int intel_crtc_atomic_check(struct drm_crtc *crtc, if (!ret) ret = icl_check_nv12_planes(pipe_config); + + if (WARN_ON(!intel_crtc)) + return -EINVAL; + if (!ret) ret = skl_check_pipe_max_pixel_rate(intel_crtc, pipe_config); diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 7357bddf9ad9..df5d01d4345b 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4160,6 +4160,9 @@ int skl_check_pipe_max_pixel_rate(struct intel_crtc *intel_crtc, uint_fixed_16_16_t fp_9_div_8 = div_fixed16(9, 8); int bpp; + if (WARN_ON(!pstate)) + return -EINVAL; + if (!intel_wm_plane_visible(cstate, to_intel_plane_state(pstate))) continue; -- 2.19.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
