powerpc/powerpnv: Properly handle failure starting CPUs

If OPAL returns an error, propagate it upward rather than spinning
seconds waiting for a CPU that will never show up

Signed-off-by: Benjamin Herrenschmidt  <benh@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/arch/powerpc/platforms/powernv/smp.c b/arch/powerpc/platforms/powernv/smp.c
index 0bdc735db16f..6a3ecca5b725 100644
--- a/arch/powerpc/platforms/powernv/smp.c
+++ b/arch/powerpc/platforms/powernv/smp.c
@@ -77,9 +77,11 @@ int pnv_smp_kick_cpu(int nr)
         if (!paca[nr].cpu_start && firmware_has_feature(FW_FEATURE_OPALv2)) {
                 pr_devel("OPAL: Starting CPU %d (HW 0x%x)...\n", nr, pcpu);
                 rc = opal_start_cpu(pcpu, start_here);
-                if (rc != OPAL_SUCCESS)
+                if (rc != OPAL_SUCCESS) {
                         pr_warn("OPAL Error %ld starting CPU %d\n",
                                 rc, nr);
+                        return -ENODEV;
+                }
         }
         return smp_generic_kick_cpu(nr);
 }