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From: Wyes Karny <wyes.karny@amd.com>
To: <ray.huang@amd.com>, <rafael@kernel.org>, <viresh.kumar@linaro.org>
Cc: <linux-pm@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<gautham.shenoy@amd.com>, Wyes Karny <wyes.karny@amd.com>
Subject: [PATCH v4 2/3] cpufreq/amd-pstate: Remove fast_switch_possible flag from active driver
Date: Wed, 17 May 2023 16:28:16 +0000	[thread overview]
Message-ID: <20230517162817.8538-3-wyes.karny@amd.com> (raw)
In-Reply-To: <20230517162817.8538-1-wyes.karny@amd.com>

amd_pstate active mode driver is only compatible with static governors.
Therefore it doesn't need fast_switch functionality. Remove
fast_switch_possible flag from amd_pstate active mode driver.

Fixes: ffa5096a7c33 ("cpufreq: amd-pstate: implement Pstate EPP support for the AMD processors")
Signed-off-by: Wyes Karny <wyes.karny@amd.com>
---
 drivers/cpufreq/amd-pstate.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 45711fc0a856..ac54779f5a49 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -1102,7 +1102,6 @@ static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy)
 	policy->policy = CPUFREQ_POLICY_POWERSAVE;
 
 	if (boot_cpu_has(X86_FEATURE_CPPC)) {
-		policy->fast_switch_possible = true;
 		ret = rdmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_REQ, &value);
 		if (ret)
 			return ret;
@@ -1125,7 +1124,6 @@ static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy)
 static int amd_pstate_epp_cpu_exit(struct cpufreq_policy *policy)
 {
 	pr_debug("CPU %d exiting\n", policy->cpu);
-	policy->fast_switch_possible = false;
 	return 0;
 }
 
-- 
2.34.1


  parent reply	other threads:[~2023-05-17 16:30 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-17 16:28 [PATCH v4 0/3] cpufreq/amd-pstate: Fix null pointer dereference when frequency invariance is disabled Wyes Karny
2023-05-17 16:28 ` [PATCH v4 1/3] amd_pstate: Add ->fast_switch() callback Wyes Karny
2023-05-24 17:47   ` Rafael J. Wysocki
2023-05-29  6:57     ` Wyes Karny
2023-05-17 16:28 ` Wyes Karny [this message]
2023-05-17 16:28 ` [PATCH v4 3/3] cpufreq: Return failure if fast_switch is not set and fast_switch_possible is set Wyes Karny
2023-05-22  8:28   ` kernel test robot
2023-05-24 17:44   ` Rafael J. Wysocki
2023-05-29 14:08     ` Wyes Karny
2023-05-29 14:25       ` [PATCH v4.1] cpufreq: Fail driver register if it has adjust_perf without fast_switch Wyes Karny
2023-06-15 16:16         ` Rafael J. Wysocki

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