From: David Brownell <david-b@pacbell.net>
To: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Andrew Victor <linux@maxim.org.za>,
Patrice VILCHEZ <patrice.vilchez@atmel.com>,
ARM Linux Mailing List <linux-arm-kernel@lists.arm.linux.org.uk>,
Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] usb: at91_udc: correct hanging while disconnecting usb cable
Date: Thu, 6 Dec 2007 08:02:52 -0800 [thread overview]
Message-ID: <200712060802.53229.david-b@pacbell.net> (raw)
In-Reply-To: <4757D7F3.8040904@atmel.com>
On Thursday 06 December 2007, Nicolas Ferre wrote:
> Correct hanging while disconnecting the USB device
> cable. Prevent a race between vbus and UDP interrupts.
> This bug was tracked on at91sam9260ek boards.
>
> Signed-off-by: Nicolas Ferre <nicolas.ferre@rfo.atmel.com>
> ---
>
> A usb resume interrupt was firing after the vbus
> interrupt : the IP was then already stoped and not able
> to deal with it (no more clock). A simple interrupt disabling
> is ok as the "end of bus reset" irq is non maskable and ok
> to resume the USB device IP.
Good, thanks for finding this. The bug was reported
recently, and obviously can't be reproduced except on
boards which *have* a VBUS interrupt!
I've signed off on this and suggested Greg merge it
before the 2.6.24-final freeze.
- Dave
prev parent reply other threads:[~2007-12-06 17:22 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-06 11:07 [PATCH] usb: at91_udc: correct hanging while disconnecting usb cable Nicolas Ferre
2007-12-06 16:02 ` David Brownell [this message]
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