From: Xiongfeng Wang <wangxiongfeng2@huawei.com>
To: <rjw@rjwysocki.net>, <viresh.kumar@linaro.org>,
<Souvik.Chakravarty@arm.com>, <Thanu.Rangarajan@arm.com>
Cc: <Sudeep.Holla@arm.com>, <guohanjun@huawei.com>,
<john.garry@huawei.com>, <jonathan.cameron@huawei.com>,
<linux-pm@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<wangxiongfeng2@huawei.com>
Subject: [RFC PATCH 1/3] cpufreq: fix the return value in 'cpufreq_boost_set_sw()'
Date: Fri, 8 May 2020 17:11:02 +0800 [thread overview]
Message-ID: <1588929064-30270-2-git-send-email-wangxiongfeng2@huawei.com> (raw)
In-Reply-To: <1588929064-30270-1-git-send-email-wangxiongfeng2@huawei.com>
When I try to add SW BOOST support for CPPC, I got the following error:
cpufreq: cpufreq_boost_trigger_state: Cannot enable BOOST
cpufreq: store_boost: Cannot enable BOOST!
It is because return value 1 of 'freq_qos_update_request()' means the
effective constraint value has changed, not a error code on failures.
But for 'cpufreq_driver.set_boost()', a nonzero return value means
failure. So change 'ret' to zero when 'freq_qos_update_request()'
returns a positive value.
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
---
drivers/cpufreq/cpufreq.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 4adac3a..475fb1b 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -2522,6 +2522,8 @@ static int cpufreq_boost_set_sw(int state)
ret = freq_qos_update_request(policy->max_freq_req, policy->max);
if (ret < 0)
break;
+ else
+ ret = 0;
}
return ret;
--
1.7.12.4
next prev parent reply other threads:[~2020-05-08 9:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-08 9:11 [RFC PATCH 0/3] add SW BOOST support for CPPC Xiongfeng Wang
2020-05-08 9:11 ` Xiongfeng Wang [this message]
2020-05-14 13:54 ` [RFC PATCH 1/3] cpufreq: fix the return value in 'cpufreq_boost_set_sw()' Rafael J. Wysocki
2020-05-15 1:28 ` Xiongfeng Wang
2020-05-08 9:11 ` [RFC PATCH 2/3] cpufreq: Add SW BOOST support for drivers without frequency table Xiongfeng Wang
2020-05-14 14:16 ` Rafael J. Wysocki
2020-05-15 1:49 ` Xiongfeng Wang
2020-05-18 7:53 ` Viresh Kumar
2020-05-19 1:04 ` Xiongfeng Wang
2020-05-08 9:11 ` [RFC PATCH 3/3] CPPC: add support for SW BOOST Xiongfeng Wang
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