diff options
| author | Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> | 2018-02-03 08:12:58 +0300 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2018-02-15 22:49:49 +0300 |
| commit | 3abe241337993a1e358a67427518af0162c4b769 (patch) | |
| tree | 628b60e928cc662a2981d1076fa055e8884cc93a /drivers/gpu/drm/tegra | |
| parent | 9038aa480d34c1f87dccd4afb944bb3c7cce8ec7 (diff) | |
| download | linux-3abe241337993a1e358a67427518af0162c4b769.tar.xz | |
drm/tegra: 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 fixes a potential problem or serves to add clarity in
case the implicit typecasting was already correct.
Cc: Keith Packard <keithp@keithp.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180203051302.9974-6-dhinakaran.pandiyan@intel.com
Diffstat (limited to 'drivers/gpu/drm/tegra')
| -rw-r--r-- | drivers/gpu/drm/tegra/dc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index b8403ed48285..49df2db2ad46 100644 --- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -1359,7 +1359,7 @@ static u32 tegra_dc_get_vblank_counter(struct drm_crtc *crtc) return host1x_syncpt_read(dc->syncpt); /* fallback to software emulated VBLANK counter */ - return drm_crtc_vblank_count(&dc->base); + return (u32)drm_crtc_vblank_count(&dc->base); } static int tegra_dc_enable_vblank(struct drm_crtc *crtc) |