tree 76d191e82bc3cadf548bc9338214fd7274b95345
parent 8e8248b1369c97c7bb6f8bcaee1f05deeabab8ef
author Andreas Noever <andreas.noever@gmail.com> 1409067741 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1409090088 -0700

thunderbolt: Clear hops before overwriting

Zero hops in tb_path_activate before writing a new path.

This fixes the following scenario:
 - Boot with a coldplugged device
 - Unplug device
 - Plug device back in
 - PCI hotplug fails

The hotplug operation fails because our new path matches the (now
defunct) path which was setup by the firmware for the coldplugged
device. By writing zeros before writing our path configuration we can
force thunderbolt to retrain the path.

Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>