From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date: Wed, 13 Nov 2013 23:54:17 +0000 (+0100)
Subject: ACPI / PCI root: Clear driver_data before failing enumeration
X-Git-Tag: v3.13-rc1~28^2~8^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f516bde5122422889398d10e8e746d18860bd42e;p=pandora-kernel.git

ACPI / PCI root: Clear driver_data before failing enumeration

If a PCI host bridge cannot be enumerated due to an error in
pci_acpi_scan_root(), its ACPI device object's driver_data field
has to be cleared by acpi_pci_root_add() before freeing the
object pointed to by that field, or some later acpi_pci_find_root()
checks that should fail may succeed and cause quite a bit of
confusion to ensue.

Fix acpi_pci_root_add() to clear device->driver_data before
returning an error code as appropriate.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Toshi Kani <toshi.kani@hp.com>
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