do not truncate irq number for icom adapter

irq values are u32, not u8. Large irq numbers will be truncated,
free_irq may free a different irq.

Remove incorrectly sized struct member and use the one from pci_dev.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/serial/icom.c

@@ -1473,7 +1473,7 @@ static void icom_remove_adapter(struct icom_adapter *icom_adapter)
 		}
 	}
 
-	free_irq(icom_adapter->irq_number, (void *) icom_adapter);
+	free_irq(icom_adapter->pci_dev->irq, (void *) icom_adapter);
 	iounmap(icom_adapter->base_addr);
 	icom_free_adapter(icom_adapter);
 	pci_release_regions(icom_adapter->pci_dev);
@@ -1539,7 +1539,6 @@ static int __devinit icom_probe(struct pci_dev *dev,
 	}
 
 	 icom_adapter->base_addr_pci = pci_resource_start(dev, 0);
-	 icom_adapter->irq_number = dev->irq;
 	 icom_adapter->pci_dev = dev;
 	 icom_adapter->version = ent->driver_data;
 	 icom_adapter->subsystem_id = ent->subdevice;
@@ -1570,7 +1569,7 @@ static int __devinit icom_probe(struct pci_dev *dev,
 		icom_port = &icom_adapter->port_info[index];
 
 		if (icom_port->status == ICOM_PORT_ACTIVE) {
-			icom_port->uart_port.irq = icom_port->adapter->irq_number;
+			icom_port->uart_port.irq = icom_port->adapter->pci_dev->irq;
 			icom_port->uart_port.type = PORT_ICOM;
 			icom_port->uart_port.iotype = UPIO_MEM;
 			icom_port->uart_port.membase =

drivers/serial/icom.h

@@ -258,7 +258,6 @@ struct icom_port {
 struct icom_adapter {
 	void __iomem * base_addr;
 	unsigned long base_addr_pci;
-	unsigned char irq_number;
 	struct pci_dev *pci_dev;
 	struct icom_port port_info[4];
 	int index;