linux-kernel - RE: [PATCH v3 4/8] usb: dwc3: implement stream transfer timeout

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Date:   Sat, 8 Sep 2018 03:48:58 +0000
From:   Anurag Kumar Vulisha <anuragku@...inx.com>
To:     Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        "balbi@...nel.org" <balbi@...nel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC:     "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "v.anuragkumar@...il.com" <v.anuragkumar@...il.com>
Subject: RE: [PATCH v3 4/8] usb: dwc3: implement stream transfer timeout


HI Thinh,

>> ---
>>  drivers/usb/dwc3/core.h   |  7 +++++++
>>  drivers/usb/dwc3/gadget.c | 36 ++++++++++++++++++++++++++++++++++++
>>  2 files changed, 43 insertions(+)
>>
>> diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index
>> 5bfb625..0b255e97 100644
>> --- a/drivers/usb/dwc3/core.h
>> +++ b/drivers/usb/dwc3/core.h
>> @@ -633,6 +633,11 @@ struct dwc3_event_buffer {
>>
>>  #define DWC3_TRB_NUM		256
>>
>> +/*
>> + * Timeout value in msecs used by stream_timeout_timer when streams
>> +are enabled  */
>> +#define STREAM_TIMEOUT_MS	50
>> +
>>  /**
>>   * struct dwc3_ep - device side endpoint representation
>>   * @endpoint: usb endpoint
>> @@ -656,6 +661,7 @@ struct dwc3_event_buffer {
>>   * @name: a human readable name e.g. ep1out-bulk
>>   * @direction: true for TX, false for RX
>>   * @stream_capable: true when streams are enabled
>> + * @stream_timeout_timer: timer used to aviod deadlock when streams
>> + are used
>
>Change aviod -> avoid. Also, the timer is being used when there's a deadlock rather
>than to avoid it. You probably need to explain what deadlock it is if you mentioned it
>here, but I think it's ok to simply say timeout timer for streams (unless Felipe has any
>objection).

Thanks for correcting again , will fix it in the next version of patch,

Thanks,
Anurag Kumar Vulisha