linux/debian/patches/patchset-pf/amd-pstate/0023-cpufreq-amd-pstate-Push-adjust_perf-vfunc-init-into-.patch

From f1a423d6cfc0888638642bea1b8ed5c64770888c Mon Sep 17 00:00:00 2001
From: Mario Limonciello <mario.limonciello@amd.com>
Date: Mon, 28 Oct 2024 09:55:41 -0500
Subject: cpufreq/amd-pstate: Push adjust_perf vfunc init into cpu_init

As the driver can be changed in and out of different modes it's possible
that adjust_perf is assigned when it shouldn't be.

This could happen if an MSR design is started up in passive mode and then
switches to active mode.

To solve this explicitly clear `adjust_perf` in amd_pstate_epp_cpu_init().

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
 drivers/cpufreq/amd-pstate.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -1534,6 +1534,8 @@ static int amd_pstate_epp_cpu_init(struc
 		WRITE_ONCE(cpudata->cppc_cap1_cached, value);
 	}
 
+	current_pstate_driver->adjust_perf = NULL;
+
 	return 0;
 
 free_cpudata1:
@@ -1896,8 +1898,6 @@ static int __init amd_pstate_init(void)
 	/* capability check */
 	if (cpu_feature_enabled(X86_FEATURE_CPPC)) {
 		pr_debug("AMD CPPC MSR based functionality is supported\n");
-		if (cppc_state != AMD_PSTATE_ACTIVE)
-			current_pstate_driver->adjust_perf = amd_pstate_adjust_perf;
 	} else {
 		pr_debug("AMD CPPC shared memory based functionality is supported\n");
 		static_call_update(amd_pstate_cppc_enable, shmem_cppc_enable);