netdev - Re: [PATCH net] net: cdc_ncm: workaround for missing CDC Union

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Date:	Tue, 22 Jan 2013 11:35:48 +0100
From:	Bjørn Mork <bjorn@...k.no>
To:	Oliver Neukum <oneukum@...e.de>
Cc:	Alexey Orishko <alexey.orishko@...il.com>, netdev@...r.kernel.org,
	linux-usb@...r.kernel.org, Greg Suarez <gsuarez@...thmicro.com>,
	Alexey Orishko <alexey.orishko@...ricsson.com>
Subject: Re: [PATCH net] net: cdc_ncm: workaround for missing CDC Union

Oliver Neukum <oneukum@...e.de> writes:
> On Monday 21 January 2013 16:28:48 Bjørn Mork wrote:
>
>> Agreed.  But I believe the condition should be 
>> 
>>  if (!(info->flags & FLAG_SEND_ZLP) && !(info->flags & FLAG_MULTI_PACKET)) {
>>      ..
>>  } else {
>>      urb->transfer_flags |= URB_ZERO_PACKET;
>>  }
>> 
>> to ensure that we send the ZLP in this case.
>
> Why? If a driver wants ZLP, it can set FLAG_SEND_ZLP. Your proposed change
> would take away an option from drivers without any gain.

OK.


Bjørn
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