From 294240ffe784e951dc2ef070da04fa31ef6db3a0 Mon Sep 17 00:00:00 2001
From: Jingoo Han <jingoohan1@gmail.com>
Date: Thu, 18 Jun 2015 00:12:27 +0900
Subject: [PATCH] of/address: use atomic allocation in pci_register_io_range()

When kzalloc() is called under spin_lock(), GFP_ATOMIC should be
used to avoid sleeping allocation.
The call tree is:
  of_pci_range_to_resource()
    --> pci_register_io_range() <-- takes spin_lock(&io_range_lock);
       --> kzalloc()

Signed-off-by: Jingoo Han <jingoohan1@gmail.com>
Cc: stable@vger.kernel.org # 3.18+
Signed-off-by: Rob Herring <robh@kernel.org>
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