[ACPI] HPET driver now checks for acpi_register_gsi() errors

Signed-off-by: NKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLen Brown <len.brown@intel.com>

drivers/char/hpet.c

@@ -906,11 +906,15 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data)
 		if (irqp->number_of_interrupts > 0) {
 			hdp->hd_nirqs = irqp->number_of_interrupts;
 
-			for (i = 0; i < hdp->hd_nirqs; i++)
-				hdp->hd_irq[i] =
+			for (i = 0; i < hdp->hd_nirqs; i++) {
+				int rc =
 				    acpi_register_gsi(irqp->interrupts[i],
 						      irqp->edge_level,
 						      irqp->active_high_low);
+				if (rc < 0)
+					return AE_ERROR;
+				hdp->hd_irq[i] = rc;
+			}
 		}
 	}