linux-kernel - Re: [PATCHv2 3/3] fpga_mgr: Add streaming support through the new driver

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Date:   Wed, 24 May 2017 08:25:21 -0500
From:   "Li, Yi" <yi1.li@...ux.intel.com>
To:     Alan Tull <atull@...nel.org>
Cc:     mcgrof@...nel.org, Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        wagi@...om.org, David Woodhouse <dwmw2@...radead.org>,
        rafal@...ecki.pl, arend.vanspriel@...adcom.com, rjw@...ysocki.net,
        Moritz Fischer <moritz.fischer@...us.com>, pmladek@...e.com,
        johannes.berg@...el.com, emmanuel.grumbach@...el.com,
        Luca Coelho <luciano.coelho@...el.com>, kvalo@...eaurora.org,
        luto@...nel.org, Takahiro Akashi <takahiro.akashi@...aro.org>,
        dhowells@...hat.com, pjones@...hat.com,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-fpga@...r.kernel.org
Subject: Re: [PATCHv2 3/3] fpga_mgr: Add streaming support through the new
 driver_data API



On 5/23/2017 10:25 AM, Alan Tull wrote:
> On Tue, May 23, 2017 at 10:21 AM, Alan Tull <atull@...nel.org> wrote:
>
>>>>> +
>>>>> +       mgr->state = FPGA_MGR_STATE_FIRMWARE_REQ;
>>>>> +       while (length > 0) {
>>>> This could be "do { ... } while ((params.fw_size >= FIRMWARE_CHUNK_SZ)
>>>> && (length > 0));" since that's what it's really doing.
>>> Yes, this is better, thanks.
>>>
>>>>> +               ret = driver_data_request_sync(image_name, &req_params,
>>>>> dev);
>>>>> +               if (ret) {
>>>>> +                       dev_err(dev, "Error reading firmware %d\n", ret);
>>>>> +                       mgr->state = FPGA_MGR_STATE_FIRMWARE_REQ_ERR;
>> Also need:  kfree(buf);
>>
>>>>> +                       return ret;
> Or this could be a break instead of a return.

Thanks Alan, will fix it.
>>>>> +               }
>>>>> +
>>>>> +               length -= params.fw_size;
>>>>> +               params.offset += params.fw_size;
>>>>> +               if (params.fw_size < SZ_4K)
>>>>> +                       break;
>>>>> +       }
>>>>> +
>>>>> +       kfree(buf);
>>>> Please skip a line before return.
>>>>
>>>>> +       return ret;
>>>>> +}
>>>>> +EXPORT_SYMBOL_GPL(fpga_mgr_firmware_stream);