If phy is PHY_NONE, the shift to register bits becomes negative. Check and warn about this.
Reported-by: coverity-bot <keesc...@chromium.org> References: https://lore.kernel.org/r/202211180848.D39006C@keescook Signed-off-by: Jani Nikula <jani.nik...@intel.com> --- drivers/gpu/drm/i915/display/intel_hti.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_hti.c b/drivers/gpu/drm/i915/display/intel_hti.c index 12a1f4ce1a77..c518efebdf77 100644 --- a/drivers/gpu/drm/i915/display/intel_hti.c +++ b/drivers/gpu/drm/i915/display/intel_hti.c @@ -21,6 +21,9 @@ void intel_hti_init(struct drm_i915_private *i915) bool intel_hti_uses_phy(struct drm_i915_private *i915, enum phy phy) { + if (drm_WARN_ON(&i915->drm, phy == PHY_NONE)) + return false; + return i915->display.hti.state & HDPORT_ENABLED && i915->display.hti.state & HDPORT_DDI_USED(phy); } -- 2.34.1
