tree: git://anongit.freedesktop.org/drm-intel drm-intel-next head: d5a0d4b9380a499cc140c7ee04ec80e15a8d49e5 commit: 2a743b7b8a8be8c8fc7c130c304c1243f6bbe9b7 [8/19] drm/i915/hdcp: Configure HDCP1.4 MST steram encryption status config: x86_64-randconfig-m001-20210115 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 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_hdcp.c:817 _intel_hdcp_disable() error: uninitialized symbol 'ret'. vim +/ret +817 drivers/gpu/drm/i915/display/intel_hdcp.c ee5e5e7a5e0fde drivers/gpu/drm/i915/intel_hdcp.c Sean Paul 2018-01-08 788 static int _intel_hdcp_disable(struct intel_connector *connector) ee5e5e7a5e0fde drivers/gpu/drm/i915/intel_hdcp.c Sean Paul 2018-01-08 789 { 7801f3b792b0fd drivers/gpu/drm/i915/display/intel_hdcp.c Lucas De Marchi 2020-06-30 790 struct intel_digital_port *dig_port = intel_attached_dig_port(connector); 486bba4524e00c drivers/gpu/drm/i915/display/intel_hdcp.c Ville Syrjälä 2019-12-04 791 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 486bba4524e00c drivers/gpu/drm/i915/display/intel_hdcp.c Ville Syrjälä 2019-12-04 792 struct intel_hdcp *hdcp = &connector->hdcp; 7801f3b792b0fd drivers/gpu/drm/i915/display/intel_hdcp.c Lucas De Marchi 2020-06-30 793 enum port port = dig_port->base.port; 692059318c0fc6 drivers/gpu/drm/i915/display/intel_hdcp.c Ramalingam C 2019-08-28 794 enum transcoder cpu_transcoder = hdcp->cpu_transcoder; 2cc0c7b520bf8e drivers/gpu/drm/i915/display/intel_hdcp.c Sean Paul 2020-08-18 795 u32 repeater_ctl; ee5e5e7a5e0fde drivers/gpu/drm/i915/intel_hdcp.c Sean Paul 2018-01-08 796 int ret; ^^^^^^^ ee5e5e7a5e0fde drivers/gpu/drm/i915/intel_hdcp.c Sean Paul 2018-01-08 797 65833c463886fa drivers/gpu/drm/i915/display/intel_hdcp.c Wambui Karuga 2020-01-22 798 drm_dbg_kms(&dev_priv->drm, "[%s:%d] HDCP is being disabled...\n", cb340bf37173d6 drivers/gpu/drm/i915/intel_hdcp.c Ramalingam C 2018-02-03 799 connector->base.name, connector->base.base.id); cb340bf37173d6 drivers/gpu/drm/i915/intel_hdcp.c Ramalingam C 2018-02-03 800 2a743b7b8a8be8 drivers/gpu/drm/i915/display/intel_hdcp.c Anshuman Gupta 2021-01-11 801 if (hdcp->shim->stream_encryption) { 2a743b7b8a8be8 drivers/gpu/drm/i915/display/intel_hdcp.c Anshuman Gupta 2021-01-11 802 ret = hdcp->shim->stream_encryption(connector, false); 2a743b7b8a8be8 drivers/gpu/drm/i915/display/intel_hdcp.c Anshuman Gupta 2021-01-11 803 if (ret) { 2a743b7b8a8be8 drivers/gpu/drm/i915/display/intel_hdcp.c Anshuman Gupta 2021-01-11 804 drm_err(&dev_priv->drm, "[%s:%d] Failed to disable HDCP 1.4 stream enc\n", 2a743b7b8a8be8 drivers/gpu/drm/i915/display/intel_hdcp.c Anshuman Gupta 2021-01-11 805 connector->base.name, connector->base.base.id); 2a743b7b8a8be8 drivers/gpu/drm/i915/display/intel_hdcp.c Anshuman Gupta 2021-01-11 806 return ret; 2a743b7b8a8be8 drivers/gpu/drm/i915/display/intel_hdcp.c Anshuman Gupta 2021-01-11 807 } 2a743b7b8a8be8 drivers/gpu/drm/i915/display/intel_hdcp.c Anshuman Gupta 2021-01-11 808 drm_dbg_kms(&dev_priv->drm, "HDCP 1.4 transcoder: %s stream encryption disabled\n", 2a743b7b8a8be8 drivers/gpu/drm/i915/display/intel_hdcp.c Anshuman Gupta 2021-01-11 809 transcoder_name(hdcp->stream_transcoder)); 2a743b7b8a8be8 drivers/gpu/drm/i915/display/intel_hdcp.c Anshuman Gupta 2021-01-11 810 } 2a743b7b8a8be8 drivers/gpu/drm/i915/display/intel_hdcp.c Anshuman Gupta 2021-01-11 811 36e5e7042b2020 drivers/gpu/drm/i915/display/intel_hdcp.c Sean Paul 2020-08-18 812 /* 2a743b7b8a8be8 drivers/gpu/drm/i915/display/intel_hdcp.c Anshuman Gupta 2021-01-11 813 * If there are other connectors on this port using HDCP, don't disable it 2a743b7b8a8be8 drivers/gpu/drm/i915/display/intel_hdcp.c Anshuman Gupta 2021-01-11 814 * until it disabled HDCP encryption for all connectors in MST topology. 36e5e7042b2020 drivers/gpu/drm/i915/display/intel_hdcp.c Sean Paul 2020-08-18 815 */ 2a743b7b8a8be8 drivers/gpu/drm/i915/display/intel_hdcp.c Anshuman Gupta 2021-01-11 816 if (dig_port->num_hdcp_streams > 0) 36e5e7042b2020 drivers/gpu/drm/i915/display/intel_hdcp.c Sean Paul 2020-08-18 @817 return ret; Presumably an error code was intended instead of an unintialized variable. 36e5e7042b2020 drivers/gpu/drm/i915/display/intel_hdcp.c Sean Paul 2020-08-18 818 09d56393c1d8d5 drivers/gpu/drm/i915/intel_hdcp.c Ramalingam C 2019-02-16 819 hdcp->hdcp_encrypted = false; 667944ad77f197 drivers/gpu/drm/i915/display/intel_hdcp.c Jani Nikula 2020-01-27 820 intel_de_write(dev_priv, HDCP_CONF(dev_priv, cpu_transcoder, port), 0); 692059318c0fc6 drivers/gpu/drm/i915/display/intel_hdcp.c Ramalingam C 2019-08-28 821 if (intel_de_wait_for_clear(dev_priv, --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org