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Subject[RFC PATCH 1/3] cpufreq: fix the return value in 'cpufreq_boost_set_sw()'
Date
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
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