[patch 7/24] s390: cpu up retries.

[Martin Schwidefsky]

From: Michael Ryan <ryan@xxxxxxxxxxx>

[patch 7/24] s390: cpu up retries.

Retry starting of new cpu if sigp restart returns condition code 2 (busy).

Signed-off-by: Michael Ryan <ryan@xxxxxxxxxxx>
Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
---

 arch/s390/kernel/smp.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletion(-)

diff -urpN linux-2.6/arch/s390/kernel/smp.c linux-2.6-patched/arch/s390/kernel/smp.c
--- linux-2.6/arch/s390/kernel/smp.c	2006-03-20 06:53:29.000000000 +0100
+++ linux-2.6-patched/arch/s390/kernel/smp.c	2006-03-22 14:36:17.000000000 +0100
@@ -665,7 +665,9 @@ __cpu_up(unsigned int cpu)
         cpu_lowcore->current_task = (unsigned long) idle;
         cpu_lowcore->cpu_data.cpu_nr = cpu;
 	eieio();
-	signal_processor(cpu,sigp_restart);
+
+	while (signal_processor(cpu,sigp_restart) == sigp_busy)
+		udelay(10);
 
 	while (!cpu_online(cpu))
 		cpu_relax();
-
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