From: Jiang Liu <jiang.liu@linux.intel.com>
Date: Tue, 20 Jan 2015 02:21:07 +0000 (+0800)
Subject: x86/xen: Override ACPI IRQ management callback __acpi_unregister_gsi
X-Git-Tag: fixes-v4.0-rc1~243^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8abb850a03a3a8b11a0e92949e5b99d9cc178e35;p=pandora-kernel.git

x86/xen: Override ACPI IRQ management callback __acpi_unregister_gsi

Xen overrides __acpi_register_gsi and leaves __acpi_unregister_gsi as is.
That means, an IRQ allocated by acpi_register_gsi_xen_hvm() or
acpi_register_gsi_xen() will be freed by acpi_unregister_gsi_ioapic(),
which may cause undesired effects. So override __acpi_unregister_gsi to
NULL for safety.

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: xen-devel@lists.xenproject.org
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Graeme Gregory <graeme.gregory@linaro.org>
Cc: Lv Zheng <lv.zheng@intel.com>
Link: http://lkml.kernel.org/r/1421720467-7709-4-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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