tree: git://people.freedesktop.org/~agd5f/linux.git amd-staging-4.7
head: 517e97f3ca3ec310723e8cfef69fdffb7774d5fc
commit: babb7eaf81f0e146b73170cfaafee5b10a5e2262 [5/11] drm/amdgpu: simplify
encoder and connector setup
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 6.2.0
reproduce:
wget
https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross
-O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout babb7eaf81f0e146b73170cfaafee5b10a5e2262
# save the attached .config to linux build tree
make.cross ARCH=ia64
Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings
All warnings (new ones prefixed by >>):
drivers/gpu/drm/amd/amdgpu/dce_virtual.c: In function 'dce_virtual_sw_init':
>> drivers/gpu/drm/amd/amdgpu/dce_virtual.c:662:3: warning: 'connector' may be
>> used uninitialized in this function [-Wmaybe-uninitialized]
kfree(connector);
^~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/dce_virtual.c:657:24: note: 'connector' was
declared here
struct drm_connector *connector;
^~~~~~~~~
vim +/connector +662 drivers/gpu/drm/amd/amdgpu/dce_virtual.c
646 kfree(amdgpu_encoder);
647 }
648
649 static const struct drm_encoder_funcs dce_virtual_encoder_funcs = {
650 .destroy = dce_virtual_encoder_destroy,
651 };
652
653 static int dce_virtual_connector_encoder_init(struct amdgpu_device
*adev,
654 int index)
655 {
656 struct drm_encoder *encoder;
657 struct drm_connector *connector;
658
659 /* add a new encoder */
660 encoder = kzalloc(sizeof(struct drm_encoder), GFP_KERNEL);
661 if (!encoder) {
> 662 kfree(connector);
663 return -ENOMEM;
664 }
665 encoder->possible_crtcs = 1 << index;
666 drm_encoder_init(adev->ddev, encoder,
&dce_virtual_encoder_funcs,
667 DRM_MODE_ENCODER_VIRTUAL, NULL);
668 drm_encoder_helper_add(encoder,
&dce_virtual_encoder_helper_funcs);
669
670 connector = kzalloc(sizeof(struct drm_connector), GFP_KERNEL);
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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