From: Michael Neuling Date: Fri, 6 Jun 2014 04:28:51 +0000 (+1000) Subject: powerpc: Don't setup CPUs with bad status X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=59a53afe70fd530040bdc69581f03d880157f15a;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git 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 Tested-by: Anton Blanchard cc: stable@vger.kernel.org Signed-off-by: Benjamin Herrenschmidt --- 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++;