linux-kernel - Re: [PATCH 1/2] firmware: qcom: scm: Return -EOPNOTSUPP for unsupported SHM bridge enabling

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Message-ID: <9c8ae6ef-dd71-4a2f-91c7-49eddd36e4f7@quicinc.com>
Date: Mon, 7 Oct 2024 03:31:15 +0530
From: Kuldeep Singh <quic_kuldsing@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio
	<konradybcio@...nel.org>,
        Bartosz Golaszewski
	<bartosz.golaszewski@...aro.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Qingqing Zhou <quic_qqzhou@...cinc.com>
Subject: Re: [PATCH 1/2] firmware: qcom: scm: Return -EOPNOTSUPP for
 unsupported SHM bridge enabling


>>  int qcom_scm_shm_bridge_enable(void)
>>  {
>> +	int ret;
>> +
>>  	struct qcom_scm_desc desc = {
>>  		.svc = QCOM_SCM_SVC_MP,
>>  		.cmd = QCOM_SCM_MP_SHM_BRIDGE_ENABLE,
>> @@ -1373,7 +1379,11 @@ int qcom_scm_shm_bridge_enable(void)
>>  					  QCOM_SCM_MP_SHM_BRIDGE_ENABLE))
>>  		return -EOPNOTSUPP;
>>  
>> -	return qcom_scm_call(__scm->dev, &desc, &res) ?: res.result[0];
>> +	ret = qcom_scm_call(__scm->dev, &desc, &res);
>> +	if (!ret && res.result[0] == SHMBRIDGE_RESULT_NOTSUPP)
>> +		return -EOPNOTSUPP;
>> +
>> +	return ret ?: res.result[0];
> 
> Could you please make it less cryptic?
> 
> if (ret)
> 	return ret;
> 
> if (res.result[0] == SHMBRIDGE_RESULT_NOTSUPP)
> 	return -EOPNOTSUPP;
> 
> return res.result[0];

Sure Dmitry, this looks more cleaner.
Will update in next rev.

-- 
Regards
Kuldeep