can: some fixes and cleanups to the initial device driver interface

This patch fixes a few errors sneaked into the initial version of the
device driver interface.

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/can/dev.c

@@ -477,7 +477,7 @@ int open_candev(struct net_device *dev)
 
 	return 0;
 }
-EXPORT_SYMBOL(open_candev);
+EXPORT_SYMBOL_GPL(open_candev);
 
 /*
  * Common close function for cleanup before the device gets closed.

drivers/net/can/sja1000/ems_pci.c

@@ -218,14 +218,12 @@ static int __devinit ems_pci_add_card(struct pci_dev *pdev,
 	card->conf_addr = pci_iomap(pdev, 0, EMS_PCI_MEM_SIZE);
 	if (card->conf_addr == NULL) {
 		err = -ENOMEM;
-
 		goto failure_cleanup;
 	}
 
 	card->base_addr = pci_iomap(pdev, 1, EMS_PCI_MEM_SIZE);
 	if (card->base_addr == NULL) {
 		err = -ENOMEM;
-
 		goto failure_cleanup;
 	}
 
@@ -239,7 +237,6 @@ static int __devinit ems_pci_add_card(struct pci_dev *pdev,
 	    ems_pci_readb(card, 3) != 0xCB ||
 	    ems_pci_readb(card, 4) != 0x11) {
 		dev_err(&pdev->dev, "Not EMS Dr. Thomas Wuensche interface\n");
-
 		err = -ENODEV;
 		goto failure_cleanup;
 	}

drivers/net/can/sja1000/sja1000.c

@@ -532,8 +532,8 @@ static int sja1000_open(struct net_device *dev)
 		err = request_irq(dev->irq, &sja1000_interrupt, priv->irq_flags,
 				  dev->name, (void *)dev);
 		if (err) {
-			return -EAGAIN;
 			close_candev(dev);
+			return -EAGAIN;
 		}
 	}