staging: comedi: amplc_pci224: Change return type of pci224_find_pci()

pci224_find_pci() finds a supported PCI device, returning 0 on success
or -EIO on failure and returning the pointer to the PCI device via a
struct pci_dev ** parameter.  Change it to return the struct pci_dev *
on success or NULL on failure.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/amplc_pci224.c

@@ -1255,14 +1255,11 @@ static const struct pci224_board
  * This function looks for a PCI device matching the requested board name,
  * bus and slot.
  */
-static int
-pci224_find_pci(struct comedi_device *dev, int bus, int slot,
-		struct pci_dev **pci_dev_p)
+static struct pci_dev *
+pci224_find_pci(struct comedi_device *dev, int bus, int slot)
 {
 	struct pci_dev *pci_dev = NULL;
 
-	*pci_dev_p = NULL;
-
 	/* Look for matching PCI device. */
 	for (pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, PCI_ANY_ID, NULL);
 	     pci_dev != NULL;
@@ -1289,8 +1286,7 @@ pci224_find_pci(struct comedi_device *dev, int bus, int slot,
 		}
 
 		/* Found a match. */
-		*pci_dev_p = pci_dev;
-		return 0;
+		return pci_dev;
 	}
 	/* No match found. */
 	if (bus || slot) {
@@ -1301,7 +1297,7 @@ pci224_find_pci(struct comedi_device *dev, int bus, int slot,
 		dev_err(dev->class_dev, "error! no %s found!\n",
 			thisboard->name);
 	}
-	return -EIO;
+	return NULL;
 }
 
 static void pci224_report_attach(struct comedi_device *dev, unsigned int irq)
@@ -1488,9 +1484,9 @@ static int pci224_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 		return ret;
 	}
 
-	ret = pci224_find_pci(dev, bus, slot, &pci_dev);
-	if (ret < 0)
-		return ret;
+	pci_dev = pci224_find_pci(dev, bus, slot);
+	if (pci_dev == NULL)
+		return -EIO;
 
 	return pci224_attach_common(dev, pci_dev, it->options);
 }