From: Jiang Liu <jiang.liu@linux.intel.com>
Date: Tue, 20 Jan 2015 02:21:06 +0000 (+0800)
Subject: ACPI: pci: Do not clear pci_dev->irq in acpi_pci_irq_disable()
X-Git-Tag: fixes-v4.0-rc1~243^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9889eaeb7c999cae64006bb98c47f40f412ec875;p=pandora-kernel.git

ACPI: pci: Do not clear pci_dev->irq in acpi_pci_irq_disable()

Xen pciback driver assumes that pci_dev->irq won't change after calling
pci_disable_device(). But commit cffe0a2b5a34c95a4dadc9ec7132690a5b0f6687
("x86, irq: Keep balance of IOAPIC pin reference count") frees irq
resources and resets pci_dev->irq to zero when pci_disable_device() is
called.

So this is a hotfix for 3.19 to avoid resetting pci_dev->irq, and
another proper fix will be prepared for next merging window.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Tested-by: Sander Eikelenboom <linux@eikelenboom.it>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Len Brown <lenb@kernel.org>
Link: http://lkml.kernel.org/r/1421720467-7709-3-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

Reading git-diff-tree failed