pdc202xx_new: switch to using pci_get_slot() (take 2)

Switch to using pci_get_slot() in init_setup_pdc20270() to get to the mate chip
behind DC21150 bridge as there's no need for the driver itself to walk the list
of the PCI devices (and the driver didn't check the bus # of the found device).
While at it, make it emit warning about IRQ # being fixed up (just like hpt366.c
does) and "beautify" this whole function as well as init_setup_pdc20276()...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/pci/pdc202xx_new.c

@@ -524,44 +524,52 @@ static int __devinit init_setup_pdcnew(struct pci_dev *dev, ide_pci_device_t *d)
 	return ide_setup_pci_device(dev, d);
 }
 
-static int __devinit init_setup_pdc20270(struct pci_dev *dev,
-					 ide_pci_device_t *d)
+static int __devinit init_setup_pdc20270(struct pci_dev *dev, ide_pci_device_t *d)
 {
-	struct pci_dev *findev = NULL;
-	int ret;
+	struct pci_dev *bridge = dev->bus->self;
+
+	if (bridge != NULL &&
+	    bridge->vendor == PCI_VENDOR_ID_DEC &&
+	    bridge->device == PCI_DEVICE_ID_DEC_21150) {
+		struct pci_dev *dev2;
 
-	if ((dev->bus->self &&
-	     dev->bus->self->vendor == PCI_VENDOR_ID_DEC) &&
-	    (dev->bus->self->device == PCI_DEVICE_ID_DEC_21150)) {
 		if (PCI_SLOT(dev->devfn) & 2)
 			return -ENODEV;
 
-		while ((findev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, findev)) != NULL) {
-			if ((findev->vendor == dev->vendor) &&
-			    (findev->device == dev->device) &&
-			    (PCI_SLOT(findev->devfn) & 2)) {
-				if (findev->irq != dev->irq) {
-					findev->irq = dev->irq;
-				}
-				ret = ide_setup_pci_devices(dev, findev, d);
-				if (ret < 0)
-					pci_dev_put(findev);
-				return ret;
+		dev2 = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn) + 2,
+							PCI_FUNC(dev->devfn)));
+		if (dev2 != NULL &&
+		    dev2->vendor == dev->vendor &&
+		    dev2->device == dev->device) {
+			int ret;
+
+			if (dev2->irq != dev->irq) {
+				dev2->irq = dev->irq;
+
+				printk(KERN_WARNING "%s: PCI config space "
+				       "interrupt fixed.\n", d->name);
 			}
+
+			ret = ide_setup_pci_devices(dev, dev2, d);
+			if (ret < 0)
+				pci_dev_put(dev2);
+			return ret;
 		}
 	}
 	return ide_setup_pci_device(dev, d);
 }
 
-static int __devinit init_setup_pdc20276(struct pci_dev *dev,
-					 ide_pci_device_t *d)
+static int __devinit init_setup_pdc20276(struct pci_dev *dev, ide_pci_device_t *d)
 {
-	if ((dev->bus->self) &&
-	    (dev->bus->self->vendor == PCI_VENDOR_ID_INTEL) &&
-	    ((dev->bus->self->device == PCI_DEVICE_ID_INTEL_I960) ||
-	     (dev->bus->self->device == PCI_DEVICE_ID_INTEL_I960RM))) {
-		printk(KERN_INFO "ide: Skipping Promise PDC20276 "
-			"attached to I2O RAID controller.\n");
+	struct pci_dev *bridge = dev->bus->self;
+
+	if (bridge != NULL &&
+	    bridge->vendor == PCI_VENDOR_ID_INTEL &&
+	   (bridge->device == PCI_DEVICE_ID_INTEL_I960 ||
+	    bridge->device == PCI_DEVICE_ID_INTEL_I960RM)) {
+
+		printk(KERN_INFO "%s: attached to I2O RAID controller, "
+				 "skipping.\n", d->name);
 		return -ENODEV;
 	}
 	return ide_setup_pci_device(dev, d);