[PATCH v2] firmware/psci: Print a warning if PSCI doesn't accept PC mode

[Dmitry Baryshkov]

On 21/09/2022 17:36, Sudeep Holla wrote:
> On Mon, Sep 19, 2022 at 02:58:57PM +0300, Dmitry Baryshkov wrote:
>> On 05/08/2022 17:19, Mark Rutland wrote:
>>> On Thu, Aug 04, 2022 at 04:07:50PM +0300, Dmitry Baryshkov wrote:
>>>> The function psci_pd_try_set_osi_mode() will print an error if enabling
>>>> OSI mode fails. To ease debugging PSCI issues print corresponding
>>>> message if switching to PC mode fails too.
>>>>
>>>> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
>>>
>>> Acked-by: Mark Rutland <mark.rutland at arm.com>
>>>
>>> Mark.
>>
>> Granted that this patch has been acked by the maintainers of PSCI interface,
>> how do I proceed? Should I submit it to Russel's patch tracker? Or do PSCI
>> patches land via some other tree?
>>
> 
> Not sure if I mentioned it elsewhere or in v1, we generally ask Arm SoC
> team to pick up patches directly as they are always 1-2 and rarely large
> set. You need to cc soc at kernel.org for the same.

Ack, I'll resend v2 cc'ing soc@

> 
>>>
>>>> ---
>>>> This is a replacement for [1], now moving the warning from
>>>> psci_set_osi_mode() callers to the function iself.
>>>>
>>>> https://lore.kernel.org/all/20220727182034.983727-1-dmitry.baryshkov@linaro.org/
>>>>
>>>> ---
>>>>    drivers/cpuidle/cpuidle-psci-domain.c | 4 +---
>>>>    drivers/firmware/psci/psci.c          | 2 ++
>>>>    2 files changed, 3 insertions(+), 3 deletions(-)
>>>>
>>>> diff --git a/drivers/cpuidle/cpuidle-psci-domain.c b/drivers/cpuidle/cpuidle-psci-domain.c
>>>> index 3db4fca1172b..821984947ed9 100644
>>>> --- a/drivers/cpuidle/cpuidle-psci-domain.c
>>>> +++ b/drivers/cpuidle/cpuidle-psci-domain.c
>>>> @@ -124,10 +124,8 @@ static bool psci_pd_try_set_osi_mode(void)
>>>>    		return false;
>>>>    	ret = psci_set_osi_mode(true);
>>>> -	if (ret) {
>>>> -		pr_warn("failed to enable OSI mode: %d\n", ret);
>>>> +	if (ret)
>>>>    		return false;
>>>> -	}
>>>>    	return true;
>>>>    }
>>>> diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
>>>> index cfb448eabdaa..1628f1edef4a 100644
>>>> --- a/drivers/firmware/psci/psci.c
>>>> +++ b/drivers/firmware/psci/psci.c
>>>> @@ -163,6 +163,8 @@ int psci_set_osi_mode(bool enable)
>>>>    			PSCI_1_0_SUSPEND_MODE_PC;
>>>>    	err = invoke_psci_fn(PSCI_1_0_FN_SET_SUSPEND_MODE, suspend_mode, 0, 0);
>>>> +	if (err < 0)
>>>> +		pr_warn("failed to set %s mode: %d\n", enable ? "OSI" : "PC", err);
>>>>    	return psci_to_linux_errno(err);
>>>>    }
>>>> -- 
>>>> 2.35.1
>>>>
>>
>> -- 
>> With best wishes
>> Dmitry
>>
> 

-- 
With best wishes
Dmitry