powerpc/pseries: Don't panic when H_PROD fails during cpu-online.

If an online-attempt on a CPU which has been offlined using H_CEDE
with an appropriate cede latency hint fails, don't panic.

Instead print the error message and let the __cpu_up() code notify the
CPU Hotplug framework of the failure, which in turn can notify the
other subsystem through CPU_UP_CANCELED.

Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/platforms/pseries/smp.c b/arch/powerpc/platforms/pseries/smp.c
index 8868c01..b488663 100644 (file)
--- a/arch/powerpc/platforms/pseries/smp.c
+++ b/arch/powerpc/platforms/pseries/smp.c
@@ -144,8 +144,8 @@ static void __devinit smp_pSeries_kick_cpu(int nr)
                hcpuid = get_hard_smp_processor_id(nr);
                rc = plpar_hcall_norets(H_PROD, hcpuid);
                if (rc != H_SUCCESS)
-                       panic("Error: Prod to wake up processor %d Ret= %ld\n",
-                               nr, rc);
+                       printk(KERN_ERR "Error: Prod to wake up processor %d\
+                                               Ret= %ld\n", nr, rc);
        }
 }