linux-kernel - Re: [Bugfix 3/3] xen/irq: Override ACPI IRQ management callback __acpi_unregister

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Date:	Tue, 20 Jan 2015 09:56:25 +0000
From:	David Vrabel <david.vrabel@...rix.com>
To:	Jiang Liu <jiang.liu@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Sander Eikelenboom <linux@...elenboom.it>,
	"H. Peter Anvin" <hpa@...or.com>, <x86@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Graeme Gregory <graeme.gregory@...aro.org>,
	Lv Zheng <lv.zheng@...el.com>
CC:	Tony Luck <tony.luck@...el.com>, <linux-kernel@...r.kernel.org>,
	<linux-pci@...r.kernel.org>, <xen-devel@...ts.xenproject.org>
Subject: Re: [Bugfix 3/3] xen/irq: Override ACPI IRQ management callback __acpi_unregister_gsi

On 20/01/15 02:21, Jiang Liu wrote:
> 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.

Reviewed-by: David Vrabel <david.vrabel@...rix.com>

Thanks.

David
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