x86: Remove useless reinitialization of irq descriptors

The descriptors are already initialized in exactly this way.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 4 insertions, 13 deletions

diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c
index 990ae7cfc578..a91ab503e24f 100644
--- a/arch/x86/kernel/irqinit.c
+++ b/arch/x86/kernel/irqinit.c
@@ -100,6 +100,8 @@ int vector_used_by_percpu_irq(unsigned int vector)
 
 void __init init_ISA_irqs(void)
 {
+        struct irq_chip *chip = legacy_pic->chip;
+        const char *name = chip->name;
         int i;
 
 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_LOCAL_APIC)
@@ -107,19 +109,8 @@ void __init init_ISA_irqs(void)
 #endif
         legacy_pic->init(0);
 
-        /*
-         * 16 old-style INTA-cycle interrupts:
-         */
-        for (i = 0; i < legacy_pic->nr_legacy_irqs; i++) {
-                struct irq_desc *desc = irq_to_desc(i);
-
-                desc->status = IRQ_DISABLED;
-                desc->action = NULL;
-                desc->depth = 1;
-
-                set_irq_chip_and_handler_name(i, &i8259A_chip,
-                                              handle_level_irq, "XT");
-        }
+        for (i = 0; i < legacy_pic->nr_legacy_irqs; i++)
+                set_irq_chip_and_handler_name(i, chip, handle_level_irq, name);
 }
 
 void __init init_IRQ(void)