Hi Philipp,

https://git-scm.com/docs/git-format-patch]

url:    
https://github.com/0day-ci/linux/commits/Philipp-Zabel/drm-add-drmm_encoder_alloc/20200826-203629
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: x86_64-randconfig-m001-20200826 (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 <[email protected]>
Reported-by: Dan Carpenter <[email protected]>

smatch warnings:
drivers/gpu/drm/drm_crtc.c:343 drm_crtc_init_with_planes() error: uninitialized 
symbol 'ap'.
drivers/gpu/drm/drm_crtc.c:383 __drmm_crtc_alloc_with_planes() error: 
uninitialized symbol 'ap'.

# 
https://github.com/0day-ci/linux/commit/236b7bc44ae0fdecc8e80c5aba0655ca14fdfb23
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review 
Philipp-Zabel/drm-add-drmm_encoder_alloc/20200826-203629
git checkout 236b7bc44ae0fdecc8e80c5aba0655ca14fdfb23
vim +/ap +343 drivers/gpu/drm/drm_crtc.c

236b7bc44ae0fd Philipp Zabel 2020-08-26  331  int 
drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
236b7bc44ae0fd Philipp Zabel 2020-08-26  332                          struct 
drm_plane *primary,
236b7bc44ae0fd Philipp Zabel 2020-08-26  333                          struct 
drm_plane *cursor,
236b7bc44ae0fd Philipp Zabel 2020-08-26  334                          const 
struct drm_crtc_funcs *funcs,
236b7bc44ae0fd Philipp Zabel 2020-08-26  335                          const 
char *name, ...)
236b7bc44ae0fd Philipp Zabel 2020-08-26  336  {
236b7bc44ae0fd Philipp Zabel 2020-08-26  337    va_list ap;
236b7bc44ae0fd Philipp Zabel 2020-08-26  338    int ret;
236b7bc44ae0fd Philipp Zabel 2020-08-26  339  
236b7bc44ae0fd Philipp Zabel 2020-08-26  340    if (name)
236b7bc44ae0fd Philipp Zabel 2020-08-26  341            va_start(ap, name);
236b7bc44ae0fd Philipp Zabel 2020-08-26  342    ret = 
drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs,
236b7bc44ae0fd Philipp Zabel 2020-08-26 @343                                    
name, ap);
                                                                                
      ^^

236b7bc44ae0fd Philipp Zabel 2020-08-26  344    if (name)
236b7bc44ae0fd Philipp Zabel 2020-08-26  345            va_end(ap);
236b7bc44ae0fd Philipp Zabel 2020-08-26  346  
236b7bc44ae0fd Philipp Zabel 2020-08-26  347    return ret;
236b7bc44ae0fd Philipp Zabel 2020-08-26  348  }
e13161af80c185 Matt Roper    2014-04-01  349  
EXPORT_SYMBOL(drm_crtc_init_with_planes);
f453ba0460742a Dave Airlie   2008-11-07  350  
236b7bc44ae0fd Philipp Zabel 2020-08-26  351  static void 
drmm_crtc_alloc_with_planes_cleanup(struct drm_device *dev,
236b7bc44ae0fd Philipp Zabel 2020-08-26  352                                    
        void *ptr)
236b7bc44ae0fd Philipp Zabel 2020-08-26  353  {
236b7bc44ae0fd Philipp Zabel 2020-08-26  354    struct drm_crtc *crtc = ptr;
236b7bc44ae0fd Philipp Zabel 2020-08-26  355  
236b7bc44ae0fd Philipp Zabel 2020-08-26  356    drm_crtc_cleanup(crtc);
236b7bc44ae0fd Philipp Zabel 2020-08-26  357  }
236b7bc44ae0fd Philipp Zabel 2020-08-26  358  
236b7bc44ae0fd Philipp Zabel 2020-08-26  359  void 
*__drmm_crtc_alloc_with_planes(struct drm_device *dev,
236b7bc44ae0fd Philipp Zabel 2020-08-26  360                                
size_t size, size_t offset,
236b7bc44ae0fd Philipp Zabel 2020-08-26  361                                
struct drm_plane *primary,
236b7bc44ae0fd Philipp Zabel 2020-08-26  362                                
struct drm_plane *cursor,
236b7bc44ae0fd Philipp Zabel 2020-08-26  363                                
const struct drm_crtc_funcs *funcs,
236b7bc44ae0fd Philipp Zabel 2020-08-26  364                                
const char *name, ...)
236b7bc44ae0fd Philipp Zabel 2020-08-26  365  {
236b7bc44ae0fd Philipp Zabel 2020-08-26  366    void *container;
236b7bc44ae0fd Philipp Zabel 2020-08-26  367    struct drm_crtc *crtc;
236b7bc44ae0fd Philipp Zabel 2020-08-26  368    va_list ap;
236b7bc44ae0fd Philipp Zabel 2020-08-26  369    int ret;
236b7bc44ae0fd Philipp Zabel 2020-08-26  370  
236b7bc44ae0fd Philipp Zabel 2020-08-26  371    if (!funcs || funcs->destroy)
236b7bc44ae0fd Philipp Zabel 2020-08-26  372            return ERR_PTR(-EINVAL);
236b7bc44ae0fd Philipp Zabel 2020-08-26  373  
236b7bc44ae0fd Philipp Zabel 2020-08-26  374    container = drmm_kzalloc(dev, 
size, GFP_KERNEL);
236b7bc44ae0fd Philipp Zabel 2020-08-26  375    if (!container)
236b7bc44ae0fd Philipp Zabel 2020-08-26  376            return ERR_PTR(-ENOMEM);
236b7bc44ae0fd Philipp Zabel 2020-08-26  377  
236b7bc44ae0fd Philipp Zabel 2020-08-26  378    crtc = container + offset;
236b7bc44ae0fd Philipp Zabel 2020-08-26  379  
236b7bc44ae0fd Philipp Zabel 2020-08-26  380    if (name)
236b7bc44ae0fd Philipp Zabel 2020-08-26  381            va_start(ap, name);
236b7bc44ae0fd Philipp Zabel 2020-08-26  382    ret = 
__drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs,
236b7bc44ae0fd Philipp Zabel 2020-08-26 @383                                    
  name, ap);
236b7bc44ae0fd Philipp Zabel 2020-08-26  384    if (name)
236b7bc44ae0fd Philipp Zabel 2020-08-26  385            va_end(ap);
236b7bc44ae0fd Philipp Zabel 2020-08-26  386    if (ret)
236b7bc44ae0fd Philipp Zabel 2020-08-26  387            return ERR_PTR(ret);
236b7bc44ae0fd Philipp Zabel 2020-08-26  388  
236b7bc44ae0fd Philipp Zabel 2020-08-26  389    ret = 
drmm_add_action_or_reset(dev, drmm_crtc_alloc_with_planes_cleanup,
236b7bc44ae0fd Philipp Zabel 2020-08-26  390                                   
crtc);
236b7bc44ae0fd Philipp Zabel 2020-08-26  391    if (ret)
236b7bc44ae0fd Philipp Zabel 2020-08-26  392            return ERR_PTR(ret);
236b7bc44ae0fd Philipp Zabel 2020-08-26  393  
236b7bc44ae0fd Philipp Zabel 2020-08-26  394    return container;
236b7bc44ae0fd Philipp Zabel 2020-08-26  395  }

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]

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