[PATCH] ppc64: Fix rtas_set_indicator(9005)

It turns out we were passing in the wrong thing to the rtas_set_indicator
call.  Luckily we got away with it because it looks like firmware does not
check arguments and just inserts or removes the current cpu from the global
server group.

Fix it.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ppc64/kernel/pSeries_smp.c

@@ -265,7 +265,8 @@ static void __devinit smp_xics_setup_cpu(int cpu)
 	 * necessary from a secondary thread as the OF start-cpu interface
 	 * performs this function for us on primary threads.
 	 */
-	rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE, default_distrib_server, 1);
+	rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
+		(1UL << interrupt_server_size) - 1 - default_distrib_server, 1);
 #endif
 }
 

arch/ppc64/kernel/xics.c

@@ -91,6 +91,7 @@ static int xics_irq_8259_cascade_real = 0;
 static unsigned int default_server = 0xFF;
 /* also referenced in smp.c... */
 unsigned int default_distrib_server = 0;
+unsigned int interrupt_server_size = 8;
 
 /*
  * XICS only has a single IPI, so encode the messages per CPU
@@ -511,6 +512,10 @@ void xics_init_IRQ(void)
 				default_server = ireg[0];
 				default_distrib_server = ireg[i-1]; /* take last element */
 			}
+			ireg = (uint *)get_property(np,
+					"ibm,interrupt-server#-size", NULL);
+			if (ireg)
+				interrupt_server_size = *ireg;
 			break;
 		}
 	}
@@ -650,9 +655,9 @@ void xics_migrate_irqs_away(void)
 	ops->cppr_info(cpu, 0);
 	iosync();
 
-	/* Refuse any new interrupts... */
+	/* remove ourselves from the global interrupt queue */
 	status = rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
-				    hard_smp_processor_id(), 0);
+		(1UL << interrupt_server_size) - 1 - default_distrib_server, 0);
 	WARN_ON(status != 0);
 
 	/* Allow IPIs again... */

include/asm-ppc64/xics.h

@@ -31,5 +31,6 @@ struct xics_ipi_struct {
 extern struct xics_ipi_struct xics_ipi_message[NR_CPUS] __cacheline_aligned;
 
 extern unsigned int default_distrib_server;
+extern unsigned int interrupt_server_size;
 
 #endif /* _PPC64_KERNEL_XICS_H */