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Date:	Mon, 22 Dec 2014 10:11:23 -0600
From:	Felipe Balbi <>
To:	sundeep subbaraya <>
CC:	Paul Zimmerman <>,
	"" <>,
	"" <>,
	"" <>
Subject: Re: query on DWC3


(please don't top-post)

On Sun, Dec 14, 2014 at 08:39:18AM +0530, sundeep subbaraya wrote:
> Hi Paul,
> As per my understanding, for BULK OUT we do queue a request with 512
> bytes length since we do not

sometimes we _do_ know the size. In case of Mass Storage, we _know_ that
the first bulk out transfer will be 31-bytes (CBW), if we were to start
a 31-byte transfer, we would't receive anything.

> know the length of the transfer Host is going to send. For Control OUT
> we know the length in wLength of
> Setup packet, hence I assumed there is no difference in programming
> model of Control IN and OUT.

there is _no_ difference. It's just that it was agreed that for anything
other than control ep, the function drivers would take care of it. See
the uses of quirk_ep_out_aligned_size.


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