Hello Leo (Sunpeng) Li,
This is a semi-automatic email about new static checker warnings.
The patch 31aec354f92c: "drm/amd/display: Implement interface for CRC
on CRTC" from Dec 18, 2017, leads to the following Smatch complaint:
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:323 dm_crtc_high_irq()
error: we previously assumed 'acrtc' could be null (see line 319)
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c
318
319 if (acrtc)
^^^^^
Old code checked for NULL
320 crtc_index = acrtc->crtc_id;
321
322 drm_handle_vblank(adev->ddev, crtc_index);
323 amdgpu_dm_crtc_handle_crc_irq(&acrtc->base);
^^^^^^^^^^^
The new code dereferences without checking (inside the function call).
324 }
325
regards,
dan carpenter
