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authorMichael Neuling <mikey@neuling.org>2014-06-06 14:28:51 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2014-06-11 17:03:01 +1000
commit59a53afe70fd530040bdc69581f03d880157f15a (patch)
tree4ec08cddf40f452c00eab68dd3e4f0d2c644a6d0 /arch/powerpc
parent96d016108640bc2b7fb0ee800737f80923847294 (diff)
downloadop-kernel-dev-59a53afe70fd530040bdc69581f03d880157f15a.zip
op-kernel-dev-59a53afe70fd530040bdc69581f03d880157f15a.tar.gz
powerpc: Don't setup CPUs with bad status
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> cc: stable@vger.kernel.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kernel/setup-common.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index d4d4183..e239df3 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -471,7 +471,7 @@ 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++;
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