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From: "Richard D" <richard@embunus.com>
To: "'Bryan Wu'" <cooloney.lkml@gmail.com>,
	"'David Brownell'" <david-b@pacbell.net>
Cc: "'Robin Getz'" <rgetz@blackfin.uclinux.org>,
	<linux-usb-devel@lists.sourceforge.net>, <gregkh@suse.de>,
	<linux-kernel@vger.kernel.org>
Subject: RE: [linux-usb-devel] [PATCH] : Allow embedded developers USB options normally reserved for OTG
Date: Thu, 3 Jan 2008 22:34:06 +0530	[thread overview]
Message-ID: <001c01c84e2a$ad3bceb0$07b36c10$@com> (raw)
In-Reply-To: <386072610801030005g7408f333m935c665c82d3412a@mail.gmail.com>

Does all USB Host controller hardware have the ability to disable PING?

> > > 2. Do you remember the PING issue I reported in OMAP list? How do
> you
> > > think of that?
> >
> > Yes, something needs to be done.  EHCI might benefit from the same
> > kind of patch, to cope with ill-behaved usb thumb drives.
> >
> >
> > > > I have an idea: the USB_NAKLIMIT0 should be set to some value,
> when we
> > > > got NAK timeout interrupt, we can disable PING. When enumerating
> normal
> > > > USB stick, there is no NAK timeout, because PING is efficient for
> > > > handshaking. While problem USB stick will generate NAK timeout
> > > > interrupt, we disable PING for this kind of USB device
> enumeration.



  reply	other threads:[~2008-01-03 17:11 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-02 14:48 [PATCH] : Allow embedded developers USB options normally reserved for OTG Robin Getz
2008-01-02 18:47 ` [linux-usb-devel] " David Brownell
2008-01-02 18:57   ` Felipe Balbi
2008-01-02 19:14     ` David Brownell
2008-01-02 18:58   ` Mike Frysinger
2008-01-02 19:16     ` David Brownell
2008-01-02 19:46     ` Alan Stern
2008-01-02 20:25       ` David Brownell
2008-01-02 20:58         ` Alan Stern
2008-01-03  3:50           ` David Brownell
2008-01-03  3:52           ` Bryan Wu
2008-01-03 17:01           ` Richard D
2008-01-03  3:03   ` Robin Getz
2008-01-03  3:43     ` David Brownell
2008-01-03  4:40       ` Bryan Wu
2008-01-03  7:36         ` David Brownell
2008-01-03  8:05           ` Bryan Wu
2008-01-03 17:04             ` Richard D [this message]
2008-01-04  1:20               ` Robin Getz
2008-01-03  7:58       ` Robin Getz
2008-01-03  3:47   ` Bryan Wu

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