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powerpc/powernv: Return secondary CPUs to firmware before FW update
authorVasant Hegde <hegdevasant@linux.vnet.ibm.com>
Wed, 9 Apr 2014 17:18:55 +0000 (22:48 +0530)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Mon, 28 Apr 2014 07:36:34 +0000 (17:36 +1000)
Firmware update on PowerNV platform takes several minutes. During
this time one CPU is stuck in FW and the kernel complains about "soft
lockups".

This patch returns all secondary CPUs to firmware before starting
firmware update process.

[ Reworked a bit and cleaned up -- BenH ]

Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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