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@xxxxxxxxx>
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
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,
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