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b=x79/ZWceRBzwUks0lZJZNStKzeYQy6BbZQ7BR3fiJTTN11cWpcGV9lx9cmI79FEXnQ0To+BW8rPvLR45gChprYKg/+5uCwNdXaZfZW1Mu/1Wq9FkVdf1w3KJmfwecoSrZ6DuNLosIuksASQCuctc9Nswvl9ip0ClyKd4NA1tJbE= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from MN0PR12MB6101.namprd12.prod.outlook.com (2603:10b6:208:3cb::10) by SA1PR12MB8858.namprd12.prod.outlook.com (2603:10b6:806:385::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8699.26; Mon, 5 May 2025 17:00:05 +0000 Received: from MN0PR12MB6101.namprd12.prod.outlook.com ([fe80::37ee:a763:6d04:81ca]) by MN0PR12MB6101.namprd12.prod.outlook.com ([fe80::37ee:a763:6d04:81ca%6]) with mapi id 15.20.8699.022; Mon, 5 May 2025 17:00:05 +0000 Message-ID: <05544c19-d4fe-4561-bd8a-cc6624353a99@amd.com> Date: Mon, 5 May 2025 12:00:02 -0500 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] amd-pstate-ut: Reset amd-pstate driver mode after running selftests To: Swapnil Sapkal Cc: ray.huang@amd.com, dhananjay.ugwekar@amd.com, perry.yuan@amd.com, viresh.kumar@linaro.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, rafael@kernel.org, gautham.shenoy@amd.com References: <20250430064206.7402-1-swapnil.sapkal@amd.com> Content-Language: en-US From: Mario Limonciello In-Reply-To: <20250430064206.7402-1-swapnil.sapkal@amd.com> Content-Type: text/plain; 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After running this test the mode of the > amd-pstate driver is active mode. Store and reset the mode to its original > state. > > Reviewed-by: Gautham R. Shenoy > Signed-off-by: Swapnil Sapkal Reviewed-by: Mario Limonciello > --- > drivers/cpufreq/amd-pstate-ut.c | 19 ++++++++++++------- > drivers/cpufreq/amd-pstate.c | 6 ++++++ > drivers/cpufreq/amd-pstate.h | 1 + > 3 files changed, 19 insertions(+), 7 deletions(-) > > diff --git a/drivers/cpufreq/amd-pstate-ut.c b/drivers/cpufreq/amd-pstate-ut.c > index e671bc7d1550..30835d0e4994 100644 > --- a/drivers/cpufreq/amd-pstate-ut.c > +++ b/drivers/cpufreq/amd-pstate-ut.c > @@ -242,6 +242,8 @@ static int amd_pstate_set_mode(enum amd_pstate_mode mode) > static int amd_pstate_ut_check_driver(u32 index) > { > enum amd_pstate_mode mode1, mode2 = AMD_PSTATE_DISABLE; > + enum amd_pstate_mode orig_mode = amd_pstate_get_status(); > + int ret; > > for (mode1 = AMD_PSTATE_DISABLE; mode1 < AMD_PSTATE_MAX; mode1++) { > int ret = amd_pstate_set_mode(mode1); > @@ -251,16 +253,19 @@ static int amd_pstate_ut_check_driver(u32 index) > if (mode1 == mode2) > continue; > ret = amd_pstate_set_mode(mode2); > - if (ret) { > - pr_err("%s: failed to update status for %s->%s\n", __func__, > - amd_pstate_get_mode_string(mode1), > - amd_pstate_get_mode_string(mode2)); > - return ret; > - } > + if (ret) > + goto out; > } > } > > - return 0; > +out: > + if (ret) > + pr_warn("%s: failed to update status for %s->%s: %d\n", __func__, > + amd_pstate_get_mode_string(mode1), > + amd_pstate_get_mode_string(mode2), ret); > + > + amd_pstate_set_mode(orig_mode); > + return ret; > } > > static int __init amd_pstate_ut_init(void) > diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c > index b961f3a3b580..af08049fe96f 100644 > --- a/drivers/cpufreq/amd-pstate.c > +++ b/drivers/cpufreq/amd-pstate.c > @@ -1305,6 +1305,12 @@ static ssize_t amd_pstate_show_status(char *buf) > return sysfs_emit(buf, "%s\n", amd_pstate_mode_string[cppc_state]); > } > > +int amd_pstate_get_status(void) > +{ > + return cppc_state; > +} > +EXPORT_SYMBOL_GPL(amd_pstate_get_status); > + > int amd_pstate_update_status(const char *buf, size_t size) > { > int mode_idx; > diff --git a/drivers/cpufreq/amd-pstate.h b/drivers/cpufreq/amd-pstate.h > index fbe1c08d3f06..512d5d97806e 100644 > --- a/drivers/cpufreq/amd-pstate.h > +++ b/drivers/cpufreq/amd-pstate.h > @@ -119,6 +119,7 @@ enum amd_pstate_mode { > AMD_PSTATE_MAX, > }; > const char *amd_pstate_get_mode_string(enum amd_pstate_mode mode); > +int amd_pstate_get_status(void); > int amd_pstate_update_status(const char *buf, size_t size); > > #endif /* _LINUX_AMD_PSTATE_H */