linux-kernel - Re: [Bugfix 0/3] Xen IRQ related hotfixes for v3.19

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Date:	Thu, 5 Feb 2015 21:07:57 +0100
From:	Sander Eikelenboom <linux@...elenboom.it>
To:	Jiang Liu <jiang.liu@...ux.intel.com>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	David Vrabel <david.vrabel@...rix.com>,
	Tony Luck <tony.luck@...el.com>,
	<linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org>,
	Stefan Bader <stefan@...kkit.de>
Subject: Re: [Bugfix 0/3] Xen IRQ related hotfixes for v3.19


Tuesday, January 20, 2015, 3:21:04 AM, you wrote:

> Hi Thomas,
>         This patch set includes three hotfixes related Xen IRQ for v3.19.
> Sorry for the long delay to get these two regressions fixed, it really
> cost me some time to read and understand Xen IRQ code.

> Patch 1 fixes the failure to register ACPI SCI interrupt on Xen
> domain0 by reworking acpi_gsi_to_irq(). I will backport it to v3.18
> too once it reaches the mainstream kernel.

> Patch 2 fixes the regression in Xen PCI device passthrough(pciback).
> It's a temporary solution, I will send the formal fix for v3.20 and
> it has passed tests too.

> Patch 3 fixes an issue found when reading code. There's no real bug
> reports related to this issue yet.

> Great thanks to Konrad and Sander for testing fixes for these regressions.

> Regards,
> Gerry

Hi Gerry,

Since these patches now are: tested, reviewed and have landed into mainline,
could you also provide the backports for 3.17 and 3.18 where required ?

The number of people running into these (subtle) issues with these stable
kernels seems to be steadily increasing.

--
Sander

> Jiang Liu (3):
>   xen/pci: Kill function xen_setup_acpi_sci()
>   xen/irq, ACPI: Fix regression in xen PCI passthrough caused by
>     cffe0a2b5a34
>   xen/irq: Override ACPI IRQ management callback __acpi_unregister_gsi

>  arch/x86/include/asm/acpi.h |    1 +
>  arch/x86/kernel/acpi/boot.c |   26 +++++++++++------------
>  arch/x86/pci/xen.c          |   49 ++-----------------------------------------
>  drivers/acpi/pci_irq.c      |    1 -
>  4 files changed, 16 insertions(+), 61 deletions(-)


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