36 lines
1.2 KiB
Diff
36 lines
1.2 KiB
Diff
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From 6f10d066dce0f1781b514a0352f0b427a32b1bb2 Mon Sep 17 00:00:00 2001
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From: Mario Limonciello <mario.limonciello@amd.com>
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Date: Thu, 5 Sep 2024 11:30:00 -0500
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Subject: ACPI: CPPC: Drop check for non zero perf ratio
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perf_ratio is a u64 and SCHED_CAPACITY_SCALE is a large number.
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Shifting by one will never have a zero value.
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Drop the check.
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Suggested-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
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Reviewed-by: Gautham R. Shenoy <gautham.sheoy@amd.com>
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Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
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Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
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---
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arch/x86/kernel/acpi/cppc.c | 7 +------
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1 file changed, 1 insertion(+), 6 deletions(-)
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--- a/arch/x86/kernel/acpi/cppc.c
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+++ b/arch/x86/kernel/acpi/cppc.c
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@@ -91,13 +91,8 @@ static void amd_set_max_freq_ratio(void)
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return;
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}
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- perf_ratio = div_u64(numerator * SCHED_CAPACITY_SCALE, nominal_perf);
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/* midpoint between max_boost and max_P */
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- perf_ratio = (perf_ratio + SCHED_CAPACITY_SCALE) >> 1;
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- if (!perf_ratio) {
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- pr_debug("Non-zero highest/nominal perf values led to a 0 ratio\n");
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- return;
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- }
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+ perf_ratio = (div_u64(numerator * SCHED_CAPACITY_SCALE, nominal_perf) + SCHED_CAPACITY_SCALE) >> 1;
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freq_invariance_set_perf_ratio(perf_ratio, false);
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}
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