From 62e4492c3063048a163d238cd1734273f2fc757d Mon Sep 17 00:00:00 2001
From: Andreas Noever <andreas.noever@gmail.com>
Date: Mon, 9 Jun 2014 23:03:32 +0200
Subject: [PATCH] PCI: Prevent NULL dereference during pciehp probe

pciehp assumes that dev->subordinate exists.  But we do not assign a bus if
we run out of bus numbers during enumeration.  This leads to a NULL
dereference in init_slot() (and other places).

Change pciehp_probe() to return -ENODEV when no subordinate bus is present.

Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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