linux-kernel - Re: 2.6.25-rc7: Ugh. ---> PATCH

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Date:	Wed, 02 Apr 2008 11:44:03 -0400
From:	Mark Lord <lkml@....ca>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Oliver Neukum <oliver@...kum.org>, Pavel Machek <pavel@...e.cz>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>, jikos@...e.cz,
	linux-usb@...r.kernel.org
Subject: Re: 2.6.25-rc7:  Ugh. ---> PATCH

This patch seems to fix it.
Could you guys look this over some more,
as I really am not familiar with the USB code.

* * * *

When comparing 2.6.24 against 2.6.25, this line of code
stood out as not looking entirely correct, given the new
uses of QH_STATE_UNLINK_WAIT in 2.6.25.

Applying this patch seems to fix the USB suspend/resume deaths
on my machine here.  More testing is needed to be sure.

Signed-off-by: Mark Lord <mlord@...ox.com>


--- linux-2.6.25-rc8/drivers/usb/host/ehci-hcd.c	2008-03-11 11:18:40.000000000 -0400
+++ linux/drivers/usb/host/ehci-hcd.c	2008-04-02 11:36:13.000000000 -0400
@@ -815,7 +815,7 @@
 		end_unlink_async(ehci);
 
 	/* if it's not linked then there's nothing to do */
-	if (qh->qh_state != QH_STATE_LINKED)
+	if (qh->qh_state != QH_STATE_LINKED && qh->qh_state != QH_STATE_UNLINK_WAIT)
 		;
 
 	/* defer till later if busy */
--
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