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Date:	Mon, 16 May 2016 16:16:59 +0300
From:	Felipe Balbi <>
To:	Michal Nazarewicz <>,
	Alan Stern <>
Cc:	"Du\, Changbin" <>,
	Al Viro <>,
	"gregkh\" <>,
	"rui.silva\" <>,
	"k.opasiak\" <>,
	"lars\" <>,
	"linux-usb\" <>,
	"linux-kernel\" <>
Subject: Re: [PATCH] usb: gadget: f_fs: report error if excess data received

Michal Nazarewicz <> writes:

>> Alan Stern <> writes:
>>> The point is that you don't know whether the host sent more data than
>>> expected.  All you know is that the host sent more data than the user
>>> asked the kernel for -- but maybe the user didn't ask for all the
>>> data that he expected.  Maybe the user wanted to retrieve the full
>>> set of data using two read() system calls.
> On Mon, May 16 2016, Felipe Balbi wrote:
>> right, but that just means we need to buffer the data instead of bailing
>> out of the first read() completely.
> Correct.
> I have a ~4h bus ride ahead of me so I’ll try to implement it.  If you
> don’t hear from me by the end of the day, there probably wasn’t enough
> space/comfort in the bus to use a laptop.

Cool, Michal. Thanks

seems like a kfifo would do well here(?)


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