linux-kernel - Re: [ 28/52] xHCI: add cmd_ring

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Date:	Sun, 07 Oct 2012 01:54:52 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	alan@...rguk.ukuu.org.uk, Elric Fu <elricfu1@...il.com>,
	Sarah Sharp <sarah.a.sharp@...ux.intel.com>,
	Miroslav Sabljic <miroslav.sabljic@....com>
Subject: Re: [ 28/52] xHCI: add cmd_ring_state

On Thu, 2012-10-04 at 14:21 -0700, Greg Kroah-Hartman wrote:
> 3.4-stable review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: Elric Fu <elricfu1@...il.com>
> 
> commit c181bc5b5d5c79b71203cd10cef97f802fb6f9c1 upstream.
> 
> Adding cmd_ring_state for command ring. It helps to verify
> the current command ring state for controlling the command
> ring operations.
> 
> This patch should be backported to kernels as old as 3.0.  The commit

I assume this still needs backporting for 3.0, since it wasn't included
in 3.0.45-rc1.

Ben.

> 7ed603ecf8b68ab81f4c83097d3063d43ec73bb8 "xhci: Add an assertion to
> check for virt_dev=0 bug." papers over the NULL pointer dereference that
> I now believe is related to a timed out Set Address command.  This (and
> the four patches that follow it) contain the real fix that also allows
> VIA USB 3.0 hubs to consistently re-enumerate during the plug/unplug
> stress tests.
[...]

-- 
Ben Hutchings
You can't have everything.  Where would you put it?

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