1 files changed, 28 insertions, 2 deletions

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 5e37bf14ef2..eb9fc621e05 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -64,8 +64,9 @@
 #include <asm/ptrace.h>
 #include <asm/machdep.h>
 #include <asm/udbg.h>
-#ifdef CONFIG_PPC_ISERIES
+#ifdef CONFIG_PPC64
 #include <asm/paca.h>
+#include <asm/firmware.h>
 #endif
 
 int __irq_offset_value;
@@ -95,6 +96,27 @@ extern atomic_t ipi_sent;
 EXPORT_SYMBOL(irq_desc);
 
 int distribute_irqs = 1;
+
+void local_irq_restore(unsigned long en)
+{
+        get_paca()->soft_enabled = en;
+        if (!en)
+                return;
+
+        if (firmware_has_feature(FW_FEATURE_ISERIES)) {
+                if (get_paca()->lppaca_ptr->int_dword.any_int)
+                        iseries_handle_interrupts();
+                return;
+        }
+
+        if (get_paca()->hard_enabled)
+                return;
+        /* need to hard-enable interrupts here */
+        get_paca()->hard_enabled = en;
+        if ((int)mfspr(SPRN_DEC) < 0)
+                mtspr(SPRN_DEC, 1);
+        hard_irq_enable();
+}
 #endif /* CONFIG_PPC64 */
 
 int show_interrupts(struct seq_file *p, void *v)
@@ -626,10 +648,14 @@ EXPORT_SYMBOL_GPL(irq_of_parse_and_map);
 
 void irq_dispose_mapping(unsigned int virq)
 {
-        struct irq_host *host = irq_map[virq].host;
+        struct irq_host *host;
         irq_hw_number_t hwirq;
         unsigned long flags;
 
+        if (virq == NO_IRQ)
+                return;
+
+        host = irq_map[virq].host;
         WARN_ON (host == NULL);
         if (host == NULL)
                 return;