tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-5.10 head: 93e7d232f85b0d597f8e9884386b9e3d43cedd3a commit: b192f39b07ce2cf4436dd6a18fb5e11da05fcff5 [9976/9999] UPSTREAM: drm/i915/tc: Fix TypeC PHY connect/disconnect logic on ADL-P config: i386-randconfig-m021-20220214 (https://download.01.org/0day-ci/archive/20220217/202202170550.Y6vQX0Fm-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; smatch warnings: drivers/gpu/drm/i915/display/intel_ddi.c:4177 intel_ddi_encoder_destroy() warn: variable dereferenced before check 'dig_port' (see line 4169) vim +/dig_port +4177 drivers/gpu/drm/i915/display/intel_ddi.c f6bff60e927b2f1 drivers/gpu/drm/i915/intel_ddi.c Imre Deak 2018-12-14 4165 static void intel_ddi_encoder_destroy(struct drm_encoder *encoder) f6bff60e927b2f1 drivers/gpu/drm/i915/intel_ddi.c Imre Deak 2018-12-14 4166 { cd7826aa85f1f30 drivers/gpu/drm/i915/display/intel_ddi.c Imre Deak 2021-05-26 4167 struct drm_i915_private *i915 = to_i915(encoder->dev); b7d02c3a124d9be drivers/gpu/drm/i915/display/intel_ddi.c Ville Syrjälä 2019-12-04 4168 struct intel_digital_port *dig_port = enc_to_dig_port(to_intel_encoder(encoder)); b192f39b07ce2cf drivers/gpu/drm/i915/display/intel_ddi.c Imre Deak 2021-09-29 @4169 enum phy phy = intel_port_to_phy(i915, dig_port->base.port); ^^^^^^^^^^^^^^ Dereference f6bff60e927b2f1 drivers/gpu/drm/i915/intel_ddi.c Imre Deak 2018-12-14 4170 f6bff60e927b2f1 drivers/gpu/drm/i915/intel_ddi.c Imre Deak 2018-12-14 4171 intel_dp_encoder_flush_work(encoder); b192f39b07ce2cf drivers/gpu/drm/i915/display/intel_ddi.c Imre Deak 2021-09-29 4172 if (intel_phy_is_tc(i915, phy)) b192f39b07ce2cf drivers/gpu/drm/i915/display/intel_ddi.c Imre Deak 2021-09-29 4173 intel_tc_port_flush_work(dig_port); cd7826aa85f1f30 drivers/gpu/drm/i915/display/intel_ddi.c Imre Deak 2021-05-26 4174 intel_display_power_flush_work(i915); f6bff60e927b2f1 drivers/gpu/drm/i915/intel_ddi.c Imre Deak 2018-12-14 4175 f6bff60e927b2f1 drivers/gpu/drm/i915/intel_ddi.c Imre Deak 2018-12-14 4176 drm_encoder_cleanup(encoder); 41dcbc7513c69d3 drivers/gpu/drm/i915/display/intel_ddi.c Anshuman Gupta 2021-01-11 @4177 if (dig_port) ^^^^^^^^ Checked too late 41dcbc7513c69d3 drivers/gpu/drm/i915/display/intel_ddi.c Anshuman Gupta 2021-01-11 4178 kfree(dig_port->hdcp_port_data.streams); f6bff60e927b2f1 drivers/gpu/drm/i915/intel_ddi.c Imre Deak 2018-12-14 4179 kfree(dig_port); f6bff60e927b2f1 drivers/gpu/drm/i915/intel_ddi.c Imre Deak 2018-12-14 4180 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org