Fix wrong assumption in acpi_gsi_to_irq

The ia64's acpi_gsi_to_irq() function assumes irq == vector.
But in
fact irq can be different from vector. This patch fix this
wrong
assumption.

Signed-off-by: Kenji Kaneshige <kaneshige.kenjijp.fujitsu.com>

---
 arch/ia64/kernel/acpi.c |    9 ++++-----
 1 files changed, 4 insertions(+), 5 deletions(-)

Index: linux-2.6.23-rc1/arch/ia64/kernel/acpi.c
============================================================
=======
--- linux-2.6.23-rc1.orig/arch/ia64/kernel/acpi.c
+++ linux-2.6.23-rc1/arch/ia64/kernel/acpi.c
 -739,16
+739,15  int __init acpi_boot_init(void)
 
 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 {
-	int vector;
+	int tmp;
 
 	if (has_8259 && gsi < 16)
 		*irq = isa_irq_to_vector(gsi);
 	else {
-		vector = gsi_to_vector(gsi);
-		if (vector == -1)
+		tmp = gsi_to_irq(gsi);
+		if (tmp == -1)
 			return -1;
-
-		*irq = vector;
+		*irq = tmp;
 	}
 	return 0;
 }


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