[zen-kernel-zen-kernel:5.9/zen-sauce 24/24] drivers/gpu/drm/drm_plane_helper.c:113:25: warning: 'visible' is used uninitialized in this function

[zen-kernel-zen-kernel:5.9/zen-sauce 24/24] drivers/gpu/drm/drm_plane_helper.c:113:25: warning: 'visible' is used uninitialized in this function

[kernel test robot]

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tree:   https://github.com/zen-kernel/zen-kernel 5.9/zen-sauce
head:   a49dc684580cbc31949bfc4220f8ed5346382c49
commit: a49dc684580cbc31949bfc4220f8ed5346382c49 [24/24] kbuild: Disable stack conservation for GCC
config: x86_64-randconfig-s022-20201012 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-rc1-dirty
        # https://github.com/zen-kernel/zen-kernel/commit/a49dc684580cbc31949bfc4220f8ed5346382c49
        git remote add zen-kernel-zen-kernel https://github.com/zen-kernel/zen-kernel
        git fetch --no-tags zen-kernel-zen-kernel 5.9/zen-sauce
        git checkout a49dc684580cbc31949bfc4220f8ed5346382c49
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/drm_plane_helper.c: In function 'drm_primary_helper_update':
>> drivers/gpu/drm/drm_plane_helper.c:113:25: warning: 'visible' is used uninitialized in this function [-Wuninitialized]
     113 |  struct drm_plane_state plane_state = {
         |                         ^~~~~~~~~~~
   drivers/gpu/drm/drm_plane_helper.c:178:7: note: 'visible' was declared here
     178 |  bool visible;
         |       ^~~~~~~

vim +/visible +113 drivers/gpu/drm/drm_plane_helper.c

c103d1cfb3543f6 Matt Roper    2014-04-01  100  
84c0851794d40b1 Daniel Vetter 2018-10-04  101  static int drm_plane_helper_check_update(struct drm_plane *plane,
df86af9133b4958 Ville Syrjälä 2016-08-08  102  					 struct drm_crtc *crtc,
df86af9133b4958 Ville Syrjälä 2016-08-08  103  					 struct drm_framebuffer *fb,
df86af9133b4958 Ville Syrjälä 2016-08-08  104  					 struct drm_rect *src,
df86af9133b4958 Ville Syrjälä 2016-08-08  105  					 struct drm_rect *dst,
df86af9133b4958 Ville Syrjälä 2016-08-08  106  					 unsigned int rotation,
df86af9133b4958 Ville Syrjälä 2016-08-08  107  					 int min_scale,
df86af9133b4958 Ville Syrjälä 2016-08-08  108  					 int max_scale,
df86af9133b4958 Ville Syrjälä 2016-08-08  109  					 bool can_position,
df86af9133b4958 Ville Syrjälä 2016-08-08  110  					 bool can_update_disabled,
df86af9133b4958 Ville Syrjälä 2016-08-08  111  					 bool *visible)
df86af9133b4958 Ville Syrjälä 2016-08-08  112  {
10b47ee02d1ae66 Ville Syrjälä 2017-11-01 @113  	struct drm_plane_state plane_state = {
df86af9133b4958 Ville Syrjälä 2016-08-08  114  		.plane = plane,
df86af9133b4958 Ville Syrjälä 2016-08-08  115  		.crtc = crtc,
df86af9133b4958 Ville Syrjälä 2016-08-08  116  		.fb = fb,
df86af9133b4958 Ville Syrjälä 2016-08-08  117  		.src_x = src->x1,
df86af9133b4958 Ville Syrjälä 2016-08-08  118  		.src_y = src->y1,
df86af9133b4958 Ville Syrjälä 2016-08-08  119  		.src_w = drm_rect_width(src),
df86af9133b4958 Ville Syrjälä 2016-08-08  120  		.src_h = drm_rect_height(src),
df86af9133b4958 Ville Syrjälä 2016-08-08  121  		.crtc_x = dst->x1,
df86af9133b4958 Ville Syrjälä 2016-08-08  122  		.crtc_y = dst->y1,
df86af9133b4958 Ville Syrjälä 2016-08-08  123  		.crtc_w = drm_rect_width(dst),
df86af9133b4958 Ville Syrjälä 2016-08-08  124  		.crtc_h = drm_rect_height(dst),
df86af9133b4958 Ville Syrjälä 2016-08-08  125  		.rotation = rotation,
df86af9133b4958 Ville Syrjälä 2016-08-08  126  		.visible = *visible,
df86af9133b4958 Ville Syrjälä 2016-08-08  127  	};
10b47ee02d1ae66 Ville Syrjälä 2017-11-01  128  	struct drm_crtc_state crtc_state = {
10b47ee02d1ae66 Ville Syrjälä 2017-11-01  129  		.crtc = crtc,
10b47ee02d1ae66 Ville Syrjälä 2017-11-01  130  		.enable = crtc->enabled,
81af63a4af82e73 Ville Syrjälä 2018-01-23  131  		.mode = crtc->mode,
10b47ee02d1ae66 Ville Syrjälä 2017-11-01  132  	};
df86af9133b4958 Ville Syrjälä 2016-08-08  133  	int ret;
df86af9133b4958 Ville Syrjälä 2016-08-08  134  
a01cb8ba3f62829 Ville Syrjälä 2017-11-01  135  	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
81af63a4af82e73 Ville Syrjälä 2018-01-23  136  						  min_scale, max_scale,
df86af9133b4958 Ville Syrjälä 2016-08-08  137  						  can_position,
df86af9133b4958 Ville Syrjälä 2016-08-08  138  						  can_update_disabled);
df86af9133b4958 Ville Syrjälä 2016-08-08  139  	if (ret)
df86af9133b4958 Ville Syrjälä 2016-08-08  140  		return ret;
df86af9133b4958 Ville Syrjälä 2016-08-08  141  
10b47ee02d1ae66 Ville Syrjälä 2017-11-01  142  	*src = plane_state.src;
10b47ee02d1ae66 Ville Syrjälä 2017-11-01  143  	*dst = plane_state.dst;
10b47ee02d1ae66 Ville Syrjälä 2017-11-01  144  	*visible = plane_state.visible;
df86af9133b4958 Ville Syrjälä 2016-08-08  145  
df86af9133b4958 Ville Syrjälä 2016-08-08  146  	return 0;
df86af9133b4958 Ville Syrjälä 2016-08-08  147  }
7daf8d54c17c6da Matt Roper    2014-05-29  148  

:::::: The code at line 113 was first introduced by commit
:::::: 10b47ee02d1ae66160058241cf5b962f64e81b47 drm: Check crtc_state->enable rather than crtc->enabled in drm_plane_helper_check_state()

:::::: TO: Ville Syrjälä <ville.syrjala@linux.intel.com>
:::::: CC: Ville Syrjälä <ville.syrjala@linux.intel.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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