[Precise][SRU][PATCH 0/1] Revert upstream stable commit 73d63d03

[Stefan Bader]

On 10.04.2012 15:35, leann.ogasawara at canonical.com wrote:
> From: Leann Ogasawara <leann.ogasawara at canonical.com>
> 
> === Precise SRU Justification ===
> The latest Precise Kernel (linux-headers-3.2.0-22-generic 3.2.0-22.35)
> does not boot in pvops mode due to a kernel NULL pointer dereference
> oops generated in xen_irq_init.
> 
> === Fix ===
> Revert commit 73d63d03 which was included in upstream stable v3.2.14.
> Based on discusson upstream regarding this commit, it appears it should
> not have been applied to upstream stable v3.2.y:
> 
> http://www.mail-archive.com/stable@vger.kernel.org/msg04782.html
> 
> commit 73d63d038ee9f769f5e5b46792d227fe20e442c5
> Author: Suresh Siddha <suresh.b.siddha at intel.com>
> Date: Mon Mar 12 11:36:33 2012 -0700
> 
>     x86/ioapic: Add register level checks to detect bogus io-apic
> entries
> 
> Leann Ogasawara (1):
>   Revert "x86/ioapic: Add register level checks to detect bogus io-apic
>     entries"
> 
>  arch/x86/kernel/apic/io_apic.c |   40 ++++++++--------------------------------
>  1 files changed, 8 insertions(+), 32 deletions(-)
> 
> === Testing ===
> The bug reporter has tested a kernel with the above commit reverted.
> They confirm the machine boots properly.
> 
> Note, the same patch also went into upstream stable v3.0.y and hit
> Oneiric, commit f9021c45.  I do not have test confirmation for Oneiric,
> but I believe the evidence to be sufficient enough to support reverting
> in Oneiric as well.
>  

This one seems to work around the issue in 3.4... was that tried?


commit 2531d64b6fe2724dc432b67d8dc66bd45621da0b
Author: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com>
Date:   Tue Mar 20 15:04:18 2012 -0400

    xen/x86: Workaround 'x86/ioapic: Add register level checks to detect bogus i

    The above mentioned patch checks the IOAPIC and if it contains...

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