TC2: cpu0 hot unplug stalled system

[Naresh Kamboju]

CPU0 hot unplug stalled system.
This is been noticed on LSK and linux-linaro.
Serial console stopped responding and Android screen stalled.

Test case to reproduce:
---------------------------------
root@vexpress:/ # echo 0 > /sys/devices/system/cpu/cpu0/online
[ 9791.920840] IRQ160 no longer affine to CPU0
[ 9791.921149] CPU0: shutdown

LSK:
------
Linux version 3.10.42-00214-gddb020c (jenkins-build@ip-10-242-58-95) (gcc version 4.8.3 20140401 (prerelease) (Linaro GCC 4.8-2014.04) ) #1 SMP Wed Jun 11 04:18:29 UTC 2014

Linux-linaro:
-----------------
Linux version 3.15.0 (jenkins-build@ip-10-60-19-154) (gcc version 4.8.3 20140401 (prerelease) (Linaro GCC 4.8-2014.04) ) #1 SMP Wed Jun 18 01:11:15 UTC 2014

This bug started occurring from June-11-2014 and LSK commit ID: ddb020c86c1de65

[Alex Shi (alex-shi)]

Hi Naresh,

ddb020c86c1de65 is a merge commit. you need to run 'git bisect' for detailed specific commit.

[Alex Shi (alex-shi)]

Naresh,
please notify me for any LSK bugs.

[Naresh Kamboju (naresh-kamboju)]

Bugs moved to bugzilla.
https://bugs.linaro.org/show_bug.cgi?id=16