From 113bf1c9f1e035129f8631b032669d6ab36a14dd Mon Sep 17 00:00:00 2001
From: Jon Mason <jon.mason@intel.com>
Date: Fri, 16 Nov 2012 18:52:57 -0700
Subject: [PATCH] NTB: BWD Link Recovery

The BWD NTB device will drop the link if an error is encountered on the
point-to-point PCI bridge.  The link will stay down until all errors are
cleared and the link is re-established.  On link down, check to see if
the error is detected, if so do the necessary housekeeping to try and
recover from the error and reestablish the link.

There is a potential race between the 2 NTB devices recovering at the
same time.  If the times are synchronized, the link will not recover and the
driver will be stuck in this loop forever.  Add a random interval to the
recovery time to prevent this race.

Signed-off-by: Jon Mason <jon.mason@intel.com>
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