linux-kernel - Re: [PATCH v2 2/6] soc: hisilicon: kunpeng_hccs: Return failure on having not die or port information

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Message-ID: <858c23e1-2ff9-34fd-80b4-405ebd54d287@huawei.com>
Date: Tue, 27 Aug 2024 19:04:54 +0800
From: "lihuisong (C)" <lihuisong@...wei.com>
To: Jonathan Cameron <Jonathan.Cameron@...wei.com>
CC: <xuwei5@...ilicon.com>, <linux-kernel@...r.kernel.org>, <soc@...nel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <krzk@...nel.org>,
	<wanghuiqiang@...wei.com>, <liuyonglong@...wei.com>
Subject: Re: [PATCH v2 2/6] soc: hisilicon: kunpeng_hccs: Return failure on
 having not die or port information


在 2024/8/23 16:33, Jonathan Cameron 写道:
> On Fri, 23 Aug 2024 11:10:55 +0800
> Huisong Li <lihuisong@...wei.com> wrote:
>
>> Driver is unavailable if all die number or all port number obtained from
>> firmware are zero. So return failure in this case.
> Perhaps should include a little info on whether there are firmware's out
> there that do this or not?  I.e. Fix, or hardening?
Ack
just hardening code.
>
>> Signed-off-by: Huisong Li <lihuisong@...wei.com>
> Otherwise, this lgtm.
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
>
>> ---
>>   drivers/soc/hisilicon/kunpeng_hccs.c | 8 ++++++--
>>   1 file changed, 6 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/soc/hisilicon/kunpeng_hccs.c b/drivers/soc/hisilicon/kunpeng_hccs.c
>> index c4a57328f22a..6e88f597f267 100644
>> --- a/drivers/soc/hisilicon/kunpeng_hccs.c
>> +++ b/drivers/soc/hisilicon/kunpeng_hccs.c
>> @@ -451,6 +451,7 @@ static int hccs_query_all_die_info_on_platform(struct hccs_dev *hdev)
>>   	struct device *dev = hdev->dev;
>>   	struct hccs_chip_info *chip;
>>   	struct hccs_die_info *die;
>> +	bool has_die_info = false;
>>   	u8 i, j;
>>   	int ret;
>>   
>> @@ -459,6 +460,7 @@ static int hccs_query_all_die_info_on_platform(struct hccs_dev *hdev)
>>   		if (!chip->die_num)
>>   			continue;
>>   
>> +		has_die_info = true;
>>   		chip->dies = devm_kzalloc(hdev->dev,
>>   				chip->die_num * sizeof(struct hccs_die_info),
>>   				GFP_KERNEL);
>> @@ -480,7 +482,7 @@ static int hccs_query_all_die_info_on_platform(struct hccs_dev *hdev)
>>   		}
>>   	}
>>   
>> -	return 0;
>> +	return has_die_info ? 0 : -EINVAL;
>>   }
>>   
>>   static int hccs_get_bd_info(struct hccs_dev *hdev, u8 opcode,
>> @@ -601,6 +603,7 @@ static int hccs_query_all_port_info_on_platform(struct hccs_dev *hdev)
>>   	struct device *dev = hdev->dev;
>>   	struct hccs_chip_info *chip;
>>   	struct hccs_die_info *die;
>> +	bool has_port_info = false;
>>   	u8 i, j;
>>   	int ret;
>>   
>> @@ -611,6 +614,7 @@ static int hccs_query_all_port_info_on_platform(struct hccs_dev *hdev)
>>   			if (!die->port_num)
>>   				continue;
>>   
>> +			has_port_info = true;
>>   			die->ports = devm_kzalloc(dev,
>>   				die->port_num * sizeof(struct hccs_port_info),
>>   				GFP_KERNEL);
>> @@ -629,7 +633,7 @@ static int hccs_query_all_port_info_on_platform(struct hccs_dev *hdev)
>>   		}
>>   	}
>>   
>> -	return 0;
>> +	return has_port_info ? 0 : -EINVAL;
>>   }
>>   
>>   static int hccs_get_hw_info(struct hccs_dev *hdev)
> .