[ACPI] 8250 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/serial/8250_acpi.c

@@ -47,18 +47,30 @@ static acpi_status acpi_serial_port(struct uart_port *port,
 static acpi_status acpi_serial_ext_irq(struct uart_port *port,
 				       struct acpi_resource_ext_irq *ext_irq)
 {
-	if (ext_irq->number_of_interrupts > 0)
-		port->irq = acpi_register_gsi(ext_irq->interrupts[0],
+	int rc;
+
+	if (ext_irq->number_of_interrupts > 0) {
+		rc = acpi_register_gsi(ext_irq->interrupts[0],
 	                   ext_irq->edge_level, ext_irq->active_high_low);
+		if (rc < 0)
+			return AE_ERROR;
+		port->irq = rc;
+	}
 	return AE_OK;
 }
 
 static acpi_status acpi_serial_irq(struct uart_port *port,
 				   struct acpi_resource_irq *irq)
 {
-	if (irq->number_of_interrupts > 0)
-		port->irq = acpi_register_gsi(irq->interrupts[0],
+	int rc;
+
+	if (irq->number_of_interrupts > 0) {
+		rc = acpi_register_gsi(irq->interrupts[0],
 	                   irq->edge_level, irq->active_high_low);
+		if (rc < 0)
+			return AE_ERROR;
+		port->irq = rc;
+	}
 	return AE_OK;
 }