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Date:   Sun, 23 Apr 2023 05:17:07 +0800
From:   kernel test robot <lkp@intel.com>
To:     Nikita Zhandarovich <n.zhandarovich@fintech.ru>,
        David Airlie <airlied@gmail.com>
Cc:     llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
        linux-fbdev@vger.kernel.org, lvc-project@linuxtesting.org,
        dri-devel@lists.freedesktop.org,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Helge Deller <deller@gmx.de>, amd-gfx@lists.freedesktop.org,
        Nikita Zhandarovich <n.zhandarovich@fintech.ru>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Chun-Kuang Hu <chunkuang.hu@kernel.org>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        intel-gfx@lists.freedesktop.org,
        Maxime Ripard <mripard@kernel.org>,
        linux-mediatek@lists.infradead.org,
        Rodrigo Vivi <rodrigo.vivi@intel.com>,
        linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        linux-kernel@vger.kernel.org, Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [Intel-gfx] [PATCH] video/hdmi: minor fixes for *_infoframe_init
 functions
Message-ID: <202304230527.lMhdvedk-lkp@intel.com>
References: <20230412152910.9486-1-n.zhandarovich@fintech.ru>
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In-Reply-To: <20230412152910.9486-1-n.zhandarovich@fintech.ru>
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Hi Nikita,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm-tip/drm-tip]

url:    https://github.com/intel-lab-lkp/linux/commits/Nikita-Zhandarovich/video-hdmi-minor-fixes-for-_infoframe_init-functions/20230421-221128
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
patch link:    https://lore.kernel.org/r/20230412152910.9486-1-n.zhandarovich%40fintech.ru
patch subject: [Intel-gfx] [PATCH] video/hdmi: minor fixes for *_infoframe_init functions
config: x86_64-allmodconfig (https://download.01.org/0day-ci/archive/20230423/202304230527.lMhdvedk-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/63c44f02ae13a5f50eadc26f5b45d4ade624f20c
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Nikita-Zhandarovich/video-hdmi-minor-fixes-for-_infoframe_init-functions/20230421-221128
        git checkout 63c44f02ae13a5f50eadc26f5b45d4ade624f20c
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/xen/ drivers/gpu/drm/i915/ drivers/power/supply/ drivers/vdpa/mlx5/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304230527.lMhdvedk-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/i915/display/intel_hdmi.c:769:37: error: variable 'ret' is uninitialized when used here [-Werror,-Wuninitialized]
           if (drm_WARN_ON(encoder->base.dev, ret))
                                              ^~~
   include/drm/drm_print.h:630:19: note: expanded from macro 'drm_WARN_ON'
           drm_WARN((drm), (x), "%s",                                      \
                            ^
   include/drm/drm_print.h:620:7: note: expanded from macro 'drm_WARN'
           WARN(condition, "%s %s: " format,                               \
                ^~~~~~~~~
   include/asm-generic/bug.h:131:25: note: expanded from macro 'WARN'
           int __ret_warn_on = !!(condition);                              \
                                  ^~~~~~~~~
   drivers/gpu/drm/i915/display/intel_hdmi.c:756:9: note: initialize the variable 'ret' to silence this warning
           int ret;
                  ^
                   = 0
   1 error generated.


vim +/ret +769 drivers/gpu/drm/i915/display/intel_hdmi.c

b055c8f3ef9f7b drivers/gpu/drm/i915/intel_hdmi.c         Jesse Barnes        2011-07-08  748  
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  749  static bool
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  750  intel_hdmi_compute_spd_infoframe(struct intel_encoder *encoder,
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  751  				 struct intel_crtc_state *crtc_state,
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  752  				 struct drm_connector_state *conn_state)
c0864cb39c6869 drivers/gpu/drm/i915/intel_hdmi.c         Jesse Barnes        2011-08-03  753  {
7d1675dcb5a16c drivers/gpu/drm/i915/display/intel_hdmi.c Taylor, Clinton A   2022-11-29  754  	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  755  	struct hdmi_spd_infoframe *frame = &crtc_state->infoframes.spd.spd;
5adaea799c1c2c drivers/gpu/drm/i915/intel_hdmi.c         Damien Lespiau      2013-08-06  756  	int ret;
5adaea799c1c2c drivers/gpu/drm/i915/intel_hdmi.c         Damien Lespiau      2013-08-06  757  
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  758  	if (!crtc_state->has_infoframe)
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  759  		return true;
c0864cb39c6869 drivers/gpu/drm/i915/intel_hdmi.c         Jesse Barnes        2011-08-03  760  
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  761  	crtc_state->infoframes.enable |=
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  762  		intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_SPD);
c0864cb39c6869 drivers/gpu/drm/i915/intel_hdmi.c         Jesse Barnes        2011-08-03  763  
7d1675dcb5a16c drivers/gpu/drm/i915/display/intel_hdmi.c Taylor, Clinton A   2022-11-29  764  	if (IS_DGFX(i915))
63c44f02ae13a5 drivers/gpu/drm/i915/display/intel_hdmi.c Nikita Zhandarovich 2023-04-12  765  		hdmi_spd_infoframe_init(frame, "Intel", "Discrete gfx");
7d1675dcb5a16c drivers/gpu/drm/i915/display/intel_hdmi.c Taylor, Clinton A   2022-11-29  766  	else
63c44f02ae13a5 drivers/gpu/drm/i915/display/intel_hdmi.c Nikita Zhandarovich 2023-04-12  767  		hdmi_spd_infoframe_init(frame, "Intel", "Integrated gfx");
7d1675dcb5a16c drivers/gpu/drm/i915/display/intel_hdmi.c Taylor, Clinton A   2022-11-29  768  
3a47ae201e0749 drivers/gpu/drm/i915/display/intel_hdmi.c Pankaj Bharadiya    2020-01-15 @769  	if (drm_WARN_ON(encoder->base.dev, ret))
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  770  		return false;
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  771  
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  772  	frame->sdi = HDMI_SPD_SDI_PC;
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  773  
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  774  	ret = hdmi_spd_infoframe_check(frame);
3a47ae201e0749 drivers/gpu/drm/i915/display/intel_hdmi.c Pankaj Bharadiya    2020-01-15  775  	if (drm_WARN_ON(encoder->base.dev, ret))
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  776  		return false;
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  777  
fbf08556ed4344 drivers/gpu/drm/i915/intel_hdmi.c         Ville Syrj?l?       2019-02-25  778  	return true;
c0864cb39c6869 drivers/gpu/drm/i915/intel_hdmi.c         Jesse Barnes        2011-08-03  779  }
c0864cb39c6869 drivers/gpu/drm/i915/intel_hdmi.c         Jesse Barnes        2011-08-03  780  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests