2 files changed, 24 insertions, 3 deletions

diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 4a4cb5598402..77f1e06d208d 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -569,6 +569,27 @@ int rtas_set_indicator(int indicator, int index, int new_value)
 }
 EXPORT_SYMBOL(rtas_set_indicator);
 
+/*
+ * Ignoring RTAS extended delay
+ */
+int rtas_set_indicator_fast(int indicator, int index, int new_value)
+{
+        int rc;
+        int token = rtas_token("set-indicator");
+
+        if (token == RTAS_UNKNOWN_SERVICE)
+                return -ENOENT;
+
+        rc = rtas_call(token, 3, 1, NULL, indicator, index, new_value);
+
+        WARN_ON(rc == -2 || (rc >= 9900 && rc <= 9905));
+
+        if (rc < 0)
+                return rtas_error_rc(rc);
+
+        return rc;
+}
+
 void rtas_restart(char *cmd)
 {
         if (rtas_flash_term_hook)
diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c
index 2d0da6f9e244..e98863025721 100644
--- a/arch/powerpc/platforms/pseries/xics.c
+++ b/arch/powerpc/platforms/pseries/xics.c
@@ -467,7 +467,7 @@ void xics_setup_cpu(void)
          *
          * XXX: undo of teardown on kexec needs this too, as may hotplug
          */
-        rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
+        rtas_set_indicator_fast(GLOBAL_INTERRUPT_QUEUE,
                 (1UL << interrupt_server_size) - 1 - default_distrib_server, 1);
 }
 
@@ -796,7 +796,7 @@ void xics_teardown_cpu(int secondary)
          * so leave the master cpu in the group.
          */
         if (secondary)
-                rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
+                rtas_set_indicator_fast(GLOBAL_INTERRUPT_QUEUE,
                                    (1UL << interrupt_server_size) - 1 -
                                    default_distrib_server, 0);
 }
@@ -813,7 +813,7 @@ void xics_migrate_irqs_away(void)
         xics_set_cpu_priority(cpu, 0);
 
         /* remove ourselves from the global interrupt queue */
-        status = rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
+        status = rtas_set_indicator_fast(GLOBAL_INTERRUPT_QUEUE,
                 (1UL << interrupt_server_size) - 1 - default_distrib_server, 0);
         WARN_ON(status < 0);