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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/kernel/setup-common.c
parent96d016108640bc2b7fb0ee800737f80923847294 (diff)
downloadlinux-59a53afe70fd530040bdc69581f03d880157f15a.tar.bz2
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/kernel/setup-common.c')
-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 d4d418376f99..e239df3768ac 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++;