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powerpc: Don't setup CPUs with bad status

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commit 59a53afe70 upstream.

OPAL will mark a CPU that is guarded as "bad" in the status property of the CPU
node.

Unfortunatley Linux doesn't check this property and will put the bad CPU in the
present map.  This has caused hangs on booting when we try to unsplit the core.

This patch checks the CPU is avaliable via this status property before putting
it in the present map.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Tested-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michael Neuling
2014-06-06 14:28:51 +10:00
committed by Greg Kroah-Hartman
parent f45e075fcb
commit 9cd68f0672
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/kernel/setup-common.c
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@@ -461,7 +461,7 @@ void __init smp_setup_cpu_maps(void)
for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) {
DBG(" thread %d -> cpu %d (hard id %d)\n",
j, cpu, be32_to_cpu(intserv[j]));
set_cpu_present(cpu, true);
set_cpu_present(cpu, of_device_is_available(dn));
set_hard_smp_processor_id(cpu, be32_to_cpu(intserv[j]));
set_cpu_possible(cpu, true);
cpu++;