[PATCH] ia64: iosapic: simplify ISA IRQ init

Simplify ISA IRQ init by taking advantage of iosapic_override_isa_irq(),
which already does what we need.

arch/ia64/kernel/iosapic.c

@@ -611,7 +611,7 @@ iosapic_system_init (int system_pcat_compat)
 void __devinit
 iosapic_init (unsigned long phys_addr, unsigned int gsi_base)
 {
-	int num_rte, vector;
+	int num_rte;
 	unsigned int isa_irq, ver;
 	char *addr;
 
@@ -634,26 +634,15 @@ iosapic_init (unsigned long phys_addr, unsigned int gsi_base)
 	       (ver & 0xf0) >> 4, (ver & 0x0f), phys_addr, gsi_base, gsi_base + num_rte - 1);
 
 	if ((gsi_base == 0) && pcat_compat) {
-		unsigned int dest = (ia64_get_lid() >> 16) & 0xffff;
 
 		/*
 		 * Map the legacy ISA devices into the IOSAPIC data.  Some of these may
 		 * get reprogrammed later on with data from the ACPI Interrupt Source
 		 * Override table.
 		 */
-		for (isa_irq = 0; isa_irq < 16; ++isa_irq) {
-			vector = isa_irq_to_vector(isa_irq);
-
-			register_intr(isa_irq, vector, IOSAPIC_LOWEST_PRIORITY,
-				     /* IOSAPIC_POL_HIGH, IOSAPIC_EDGE */
-				     1, 1);
-
-			DBG("ISA: IRQ %u -> GSI 0x%x (high,edge) -> CPU 0x%04x vector %d\n",
-			    isa_irq, isa_irq, dest, vector);
-
-			/* program the IOSAPIC routing table: */
-			set_rte(vector, dest);
-		}
+		for (isa_irq = 0; isa_irq < 16; ++isa_irq)
+			/* IOSAPIC_POL_HIGH, IOSAPIC_EDGE */
+			iosapic_override_isa_irq(isa_irq, isa_irq, 1, 1);
 	}
 }