Hi Rafael, Thanks for your reply !
On 2020/5/14 21:54, Rafael J. Wysocki wrote: > On Friday, May 8, 2020 11:11:02 AM CEST Xiongfeng Wang wrote: >> 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 <wangxiongfe...@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; >> > > I would change cpufreq_boost_trigger_state() to take the 1 into account > properly > instead. Thanks for your suggestion. I will change it in the next version. Thanks, Xiongfeng > > Thanks! > > > > > . >
