Commit 335a4d5b authored by Michael Neuling's avatar Michael Neuling Committed by Ben Hutchings

powerpc: Don't setup CPUs with bad status

commit 59a53afe 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: default avatarMichael Neuling <mikey@neuling.org>
Tested-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
parent bb262325
......@@ -449,7 +449,7 @@ 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, intserv[j]);
set_cpu_present(cpu, true);
set_cpu_present(cpu, of_device_is_available(dn));
set_hard_smp_processor_id(cpu, intserv[j]);
set_cpu_possible(cpu, true);
cpu++;
......
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