From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [103.22.144.67]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 164911A0008 for ; Fri, 6 Jun 2014 14:28:52 +1000 (EST) From: Michael Neuling To: Benjamin Herrenschmidt Subject: [PATCH] powerpc: Don't setup CPUs with bad status Date: Fri, 6 Jun 2014 14:28:51 +1000 Message-Id: <1402028931-13195-1-git-send-email-mikey@neuling.org> Cc: linuxppc-dev@lists.ozlabs.org, Michael Neuling , Paul Mackerras , Anton Blanchard List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 --- arch/powerpc/kernel/setup-common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) 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++; -- 1.9.1