From c75da205e02dda3b79ca057e558f97f3d61c855d Mon Sep 17 00:00:00 2001
From: Aaron Lu <aaron.lu@intel.com>
Date: Fri, 14 Mar 2014 13:46:09 +0800
Subject: [PATCH] libata: acpi: avoid passing NULL to ACPI evaluation method

If ACPI handle for an ATA device is NULL, we shouldn't call
ata_dev_get_GTF as that function will use handle to do some ACPI
evaluation.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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