From: Alan Stern <stern@rowland.harvard.edu>
Date: Thu, 11 Oct 2007 20:47:36 +0000 (-0400)
Subject: USB: fix race in autosuspend reschedule
X-Git-Tag: v2.6.24-rc1~1395^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d1aa3e6aa8edfeb864af7c930523d9e588b28bea;p=pandora-kernel.git

USB: fix race in autosuspend reschedule

This patch (as1002) fixes a small race which can occur when a driver
expects usbcore to reschedule an autosuspend request.  If the request
arrives too late, it won't be rescheduled.  The patch adds an extra
argument to autosuspend_check(), indicating that a reschedule is
needed no matter how much time has elapsed.

It also tries to avoid letting asynchronous changes to the value of
jiffies cause a delay to become negative, by caching a local copy of
the current time.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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