Commit 3355ac25 authored by Mario Limonciello's avatar Mario Limonciello
Browse files

ACPI: CPPC: Drop check for non zero perf ratio 



perf_ratio is a u64 and SCHED_CAPACITY_SCALE is a large number.
Shifting by one will never have a zero value.

Drop the check.

Suggested-by: default avatarGautham R. Shenoy <gautham.shenoy@amd.com>
Reviewed-by: default avatarGautham R. Shenoy <gautham.sheoy@amd.com>
Signed-off-by: default avatarMario Limonciello <mario.limonciello@amd.com>
parent 6c09e3b4

arch/x86/kernel/acpi/cppc.c

+1 −6
Original line number Diff line number Diff line
@@ -91,13 +91,8 @@ static void amd_set_max_freq_ratio(void) 
		return;

	}



	perf_ratio = div_u64(numerator * SCHED_CAPACITY_SCALE, nominal_perf);

	/* midpoint between max_boost and max_P */

	perf_ratio = (perf_ratio + SCHED_CAPACITY_SCALE) >> 1;

	if (!perf_ratio) {

		pr_debug("Non-zero highest/nominal perf values led to a 0 ratio\n");

		return;

	}

	perf_ratio = (div_u64(numerator * SCHED_CAPACITY_SCALE, nominal_perf) + SCHED_CAPACITY_SCALE) >> 1;



	freq_invariance_set_perf_ratio(perf_ratio, false);

}