linux-kernel - Re: [PATCH v3 1/1] fpga: dfl: afu: harden port enable logic

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Date:   Thu, 4 Feb 2021 06:24:40 -0800
From:   Tom Rix <trix@...hat.com>
To:     Russ Weight <russell.h.weight@...el.com>, mdf@...nel.org,
        linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     lgoncalv@...hat.com, yilun.xu@...el.com, hao.wu@...el.com,
        matthew.gerlach@...el.com
Subject: Re: [PATCH v3 1/1] fpga: dfl: afu: harden port enable logic


On 2/3/21 3:06 PM, Russ Weight wrote:
>
> On 2/3/21 7:25 AM, Tom Rix wrote:
>> ..snip..
>>
>> On 2/2/21 3:06 PM, Russ Weight wrote:
>>> diff --git a/drivers/fpga/dfl-afu.h b/drivers/fpga/dfl-afu.h
>>> index 576e94960086..e5020e2b1f3d 100644
>>> --- a/drivers/fpga/dfl-afu.h
>>> +++ b/drivers/fpga/dfl-afu.h
>>> @@ -80,7 +80,7 @@ struct dfl_afu {
>>>  };
>>>  
>>>  /* hold pdata->lock when call __afu_port_enable/disable */
>>> -void __afu_port_enable(struct platform_device *pdev);
>>> +int __afu_port_enable(struct platform_device *pdev);
>>>  int __afu_port_disable(struct platform_device *pdev);
>>>  
>> Should the '__' prefix be removed from __afu_port* ?
>>
>> This would make the function names consistent with the other decls
> The '__' prefix is used here to help highlight the fact that these functions go not manage
> the locking themselves and must be called while holding the port mutex. There are additional
> functions, such as__port_reset(), that are following this same convention. I think these
> are OK as they are.

ok

Reviewed-by: Tom Rix <trix@...hat.com>

Tom

>
> - Russ
>
>> Tom
>>
>>>  void afu_mmio_region_init(struct dfl_feature_platform_data *pdata);