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drm/amd/display: fix math_mod() using arg1 instead of arg2

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[Why]
math_mod() multiplied by arg1 instead of arg2, returning a wrong
result for any non-trivial modulo operation.

[How]
Replace arg1 with arg2 in the subtraction term to correctly
implement fmod(arg1, arg2).

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Wenjing Liu 2026-03-26 12:00:34 -04:00 committed by Alex Deucher
parent d3a549f4df
commit 2b104fc31b
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_standalone_libraries/lib_float_math.c
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@ -23,7 +23,7 @@ double math_mod(const double arg1, const double arg2)
return arg2;
if (isNaN(arg2))
return arg1;
return arg1 - arg1 * ((int)(arg1 / arg2));
return arg1 - arg2 * ((int)(arg1 / arg2));
}
double math_min2(const double arg1, const double arg2)