From: Franck xyz <vagabon.xyz@gmail.com>
To: lkml <linux-kernel@vger.kernel.org>
Subject: Help on HCD developpement
Date: Thu, 1 Sep 2005 13:39:19 +0200 [thread overview]
Message-ID: <cda58cb8050901043967808e00@mail.gmail.com> (raw)
In-Reply-To: <cda58cb8050901025311665d7@mail.gmail.com>
Hi,
I'm trying to write a host controller driver for a Arc hardware. I
need to know how nak
pid should be handled ? Hardware can automatically manage them, that means it
automatically retry the naked transaction. But since setup packet must
not be "NAKed" or hub
endpoint #1 returns nak pid when no events happen on its port, I don't
think I can use this
feature. But if I do it manually, what should I do when receiving a
NAK ? Should I retry the
transaction forever ? What status should I return to usb core (through
urb->status) when hub
endpoint #1 returns nak ?
Thanks.
Franck
parent reply other threads:[~2005-09-01 11:39 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <cda58cb8050901025311665d7@mail.gmail.com>]
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