[SRU trusty] [pull request] (upstream) xgene: BUG: soft lockup - CPU#0 stuck for 23s! [halt:2059] on poweroff

[Andy Whitcroft]

On Fri, Dec 19, 2014 at 12:52:20PM -0500, Craig Magina wrote:
> This contains two upstream commits backported from utopic.
> 
> BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1404335
> 
> 
> The following changes since commit 892d23edba04d9a97e9843e85be961e52aa2d604:
> 
>   UBUNTU: Ubuntu-3.13.0-44.73 (2014-12-15 16:01:34 -0800)
> 
> are available in the git repository at:
> 
>   git://kernel.ubuntu.com/cmagina/trusty-xgene.git lp1404335
> 
> for you to fetch changes up to 00032765b9a95eb12852c924979b307c27a2ec42:
> 
>   arm64: Fix deadlock scenario with smp_send_stop() (2014-12-19 12:39:45 -0500)
> 
> ----------------------------------------------------------------
> Arun KS (2):
>       arm64: Fix machine_shutdown() definition
>       arm64: Fix deadlock scenario with smp_send_stop()
> 
>  arch/arm64/kernel/process.c | 45 +++++++++++++++++++++++++++++++++++++--------
>  1 file changed, 37 insertions(+), 8 deletions(-)
> 
> Thank you,

  commit 00032765b9a95eb12852c924979b307c27a2ec42
  Author: Arun KS <arunks.linux at gmail.com>
  Date:   Wed May 7 02:41:23 2014 +0100

    arm64: Fix deadlock scenario with smp_send_stop()

This first one, seems to have needed backporting because we have not
applied the following to remove fiq support:

  commit f864b61ee49bbf3faf9a10b9770c719536328d01
  Author: Nicolas Pitre <nicolas.pitre at linaro.org>
  Date:   Wed Jan 29 18:00:45 2014 +0000

    arm64: FIQs are unused

I would think we either want that one, or you want to leave the
following line in in your backport:

-       local_fiq_disable();  

The other patch looks fine.

-apw