From: Dhinakaran Pandiyan Date: Fri, 2 Feb 2018 21:12:59 -0800 Subject: drm/atomic: Handle 64-bit return from drm_crtc_vblank_count() Git-commit: f4c0468e4bd64b7cd00e2db309925728fc72bf8b Patch-mainline: v4.17-rc1 References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166 570e86963a51 ("drm: Widen vblank count to 64-bits [v3]") changed the return type for drm_crtc_vblank_count() to u64. The flip ioctl receives a 32-bit target sequence from user space and is compared against the current sequence from drm_crtc_vblank_count(). So, typecast return from drm_crtc_vblank_count() explicitly to add clarity. __drm_crtcs_state.last_vblank_count however only ever stores the value from drm_crtc_vblank_count() and can be upgraded to u64. Cc: Keith Packard Cc: Rodrigo Vivi Signed-off-by: Dhinakaran Pandiyan Reviewed-by: Keith Packard Signed-off-by: Rodrigo Vivi Link: https://patchwork.freedesktop.org/patch/msgid/20180203051302.9974-7-dhinakaran.pandiyan@intel.com Acked-by: Petr Tesarik --- drivers/gpu/drm/drm_plane.c | 2 +- include/drm/drm_atomic.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/drm_plane.c +++ b/drivers/gpu/drm/drm_plane.c @@ -967,7 +967,7 @@ int drm_mode_page_flip_ioctl(struct drm_ if (r) return r; - current_vblank = drm_crtc_vblank_count(crtc); + current_vblank = (u32)drm_crtc_vblank_count(crtc); switch (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) { case DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE: --- a/include/drm/drm_atomic.h +++ b/include/drm/drm_atomic.h @@ -154,7 +154,7 @@ struct __drm_crtcs_state { struct drm_crtc *ptr; struct drm_crtc_state *state, *old_state, *new_state; s32 __user *out_fence_ptr; - unsigned last_vblank_count; + u64 last_vblank_count; }; struct __drm_connnectors_state {