commit 699ff13f10b75ea929eea6f6fe47ba9cc8f92ca2
author Michael Ryan <ryan@funsoft.com> Fri Mar 24 03:15:17 2006 -0800
committer Linus Torvalds <torvalds@g5.osdl.org> Fri Mar 24 07:33:16 2006 -0800
tree be9ae1f4d5483b9f6887ab67a2bf27b3d34834d7
parent 4896cef8e33e668734234543afb58eb171476ff3

[PATCH] s390: cpu up retries

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

Signed-off-by: Michael Ryan <ryan@funsoft.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/s390/kernel/smp.c

diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index d52d6d2..2b8841f 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -665,7 +665,9 @@
         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();