Re: [PATCH 04/10] drm/amdgpu: Handle 64-bit return from drm_crtc_vblank_count()

On Sat, Feb 3, 2018 at 12:12 AM, Dhinakaran Pandiyan wrote: > 570e86963a51 ("drm: Widen vblank count to 64-bits [v3]") changed the > return type for drm_crtc_vblank_count() to u64. This could cause > potential problems if the return value is used in arithmetic

Re: [PATCH 04/10] drm/amdgpu: Handle 64-bit return from drm_crtc_vblank_count()

On 2018-02-03 12:12 AM, Dhinakaran Pandiyan wrote: > 570e86963a51 ("drm: Widen vblank count to 64-bits [v3]") changed the > return type for drm_crtc_vblank_count() to u64. This could cause > potential problems if the return value is used in arithmetic operations > with a 32-bit reference HW vblank

[PATCH 04/10] drm/amdgpu: Handle 64-bit return from drm_crtc_vblank_count()

570e86963a51 ("drm: Widen vblank count to 64-bits [v3]") changed the return type for drm_crtc_vblank_count() to u64. This could cause potential problems if the return value is used in arithmetic operations with a 32-bit reference HW vblank count. Explicitly typecasting this down to u32 either