[Why]
For m = drm_display_mode{.clock = 533250, .htotal = 4000, .vtotal = 2222},
common_rates[i] = 60000, the result of target_vtotal is 2221. This cause
wraparound of variable target_vtotal_diff.[How] Skip the loop if target_vtotal less than m->vtotal Signed-off-by: Leslie Shi <[email protected]> --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index c2bc7db85d7e..ed7ab089b224 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -8537,6 +8537,10 @@ static uint add_fs_modes(struct amdgpu_dm_connector *aconnector) num = (unsigned long long)m->clock * 1000 * 1000; den = common_rates[i] * (unsigned long long)m->htotal; target_vtotal = div_u64(num, den); + + if (target_vtotal < m->vtotal) + continue; + target_vtotal_diff = target_vtotal - m->vtotal; /* Check for illegal modes */ -- 2.25.1
