1 files changed, 45 insertions, 32 deletions

diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c
index 9ecf75fe9b14..ca52b587166d 100644
--- a/arch/powerpc/platforms/pseries/xics.c
+++ b/arch/powerpc/platforms/pseries/xics.c
@@ -160,6 +160,46 @@ static inline void lpar_qirr_info(int n_cpu , u8 value)
 
 /* High level handlers and init code */
 
+static void xics_update_irq_servers(void)
+{
+        int i, j;
+        struct device_node *np;
+        u32 ilen;
+        const u32 *ireg, *isize;
+        u32 hcpuid;
+
+        /* Find the server numbers for the boot cpu. */
+        np = of_get_cpu_node(boot_cpuid, NULL);
+        BUG_ON(!np);
+
+        ireg = of_get_property(np, "ibm,ppc-interrupt-gserver#s", &ilen);
+        if (!ireg) {
+                of_node_put(np);
+                return;
+        }
+
+        i = ilen / sizeof(int);
+        hcpuid = get_hard_smp_processor_id(boot_cpuid);
+
+        /* Global interrupt distribution server is specified in the last
+         * entry of "ibm,ppc-interrupt-gserver#s" property. Get the last
+         * entry fom this property for current boot cpu id and use it as
+         * default distribution server
+         */
+        for (j = 0; j < i; j += 2) {
+                if (ireg[j] == hcpuid) {
+                        default_server = hcpuid;
+                        default_distrib_server = ireg[j+1];
+
+                        isize = of_get_property(np,
+                                        "ibm,interrupt-server#-size", NULL);
+                        if (isize)
+                                interrupt_server_size = *isize;
+                }
+        }
+
+        of_node_put(np);
+}
 
 #ifdef CONFIG_SMP
 static int get_irq_server(unsigned int virq, unsigned int strict_check)
@@ -169,6 +209,9 @@ static int get_irq_server(unsigned int virq, unsigned int strict_check)
         cpumask_t cpumask = irq_desc[virq].affinity;
         cpumask_t tmp = CPU_MASK_NONE;
 
+        if (! cpu_isset(default_server, cpu_online_map))
+                xics_update_irq_servers();
+
         if (!distribute_irqs)
                 return default_server;
 
@@ -660,12 +703,9 @@ static void __init xics_setup_8259_cascade(void)
 
 void __init xics_init_IRQ(void)
 {
-        int i, j;
         struct device_node *np;
-        u32 ilen, indx = 0;
-        const u32 *ireg, *isize;
+        u32 indx = 0;
         int found = 0;
-        u32 hcpuid;
 
         ppc64_boot_msg(0x20, "XICS Init");
 
@@ -684,34 +724,7 @@ void __init xics_init_IRQ(void)
                 return;
 
         xics_init_host();
-
-        /* Find the server numbers for the boot cpu. */
-        np = of_get_cpu_node(boot_cpuid, NULL);
-        BUG_ON(!np);
-        ireg = of_get_property(np, "ibm,ppc-interrupt-gserver#s", &ilen);
-        if (!ireg)
-                goto skip_gserver_check;
-        i = ilen / sizeof(int);
-        hcpuid = get_hard_smp_processor_id(boot_cpuid);
-
-        /* Global interrupt distribution server is specified in the last
-         * entry of "ibm,ppc-interrupt-gserver#s" property. Get the last
-         * entry fom this property for current boot cpu id and use it as
-         * default distribution server
-         */
-        for (j = 0; j < i; j += 2) {
-                if (ireg[j] == hcpuid) {
-                        default_server = hcpuid;
-                        default_distrib_server = ireg[j+1];
-
-                        isize = of_get_property(np,
-                                        "ibm,interrupt-server#-size", NULL);
-                        if (isize)
-                                interrupt_server_size = *isize;
-                }
-        }
-skip_gserver_check:
-        of_node_put(np);
+        xics_update_irq_servers();
 
         if (firmware_has_feature(FW_FEATURE_LPAR))
                 ppc_md.get_irq = xics_get_irq_lpar;