staging: comedi: dyna_pci10xx: fix detach

The detach for this driver is missing the check to make sure
that the pci device is enabled before disabling it.

It's also missing the pci_dev_put().

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/dyna_pci10xx.c

@@ -346,7 +346,9 @@ static void dyna_pci10xx_detach(struct comedi_device *dev)
 	if (devpriv)
 		mutex_destroy(&devpriv->mutex);
 	if (pcidev) {
-		comedi_pci_disable(pcidev);
+		if (dev->iobase)
+			comedi_pci_disable(pcidev);
+		pci_dev_put(pcidev);
 	}
 }