MIPS: pci-legacy: use generic pci_enable_resources

Follow the reasoning from commit 842de40 ("PCI: add generic
pci_enable_resources()"):

  The only functional difference from the MIPS version is that the
  generic one uses "!r->parent" to check for resource collisions
  instead of "!r->start && r->end".

That should have no effect on any pci-legacy driver.

Suggested-by: Bjorn Helgaas <[email protected]>
Signed-off-by: Ilya Lipnitskiy <[email protected]>
Signed-off-by: Thomas Bogendoerfer <[email protected]>

Author: lipnitsk

arch/mips/pci/pci-legacy.c

@@ -241,47 +241,11 @@ static int __init pcibios_init(void)
 
 subsys_initcall(pcibios_init);
 
-static int pcibios_enable_resources(struct pci_dev *dev, int mask)
-{
-	u16 cmd, old_cmd;
-	int idx;
-	struct resource *r;
-
-	pci_read_config_word(dev, PCI_COMMAND, &cmd);
-	old_cmd = cmd;
-	for (idx=0; idx < PCI_NUM_RESOURCES; idx++) {
-		/* Only set up the requested stuff */
-		if (!(mask & (1<<idx)))
-			continue;
-
-		r = &dev->resource[idx];
-		if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))
-			continue;
-		if ((idx == PCI_ROM_RESOURCE) &&
-				(!(r->flags & IORESOURCE_ROM_ENABLE)))
-			continue;
-		if (!r->start && r->end) {
-			pci_err(dev,
-				"can't enable device: resource collisions\n");
-			return -EINVAL;
-		}
-		if (r->flags & IORESOURCE_IO)
-			cmd |= PCI_COMMAND_IO;
-		if (r->flags & IORESOURCE_MEM)
-			cmd |= PCI_COMMAND_MEMORY;
-	}
-	if (cmd != old_cmd) {
-		pci_info(dev, "enabling device (%04x -> %04x)\n", old_cmd, cmd);
-		pci_write_config_word(dev, PCI_COMMAND, cmd);
-	}
-	return 0;
-}
-
 int pcibios_enable_device(struct pci_dev *dev, int mask)
 {
-	int err;
+	int err = pci_enable_resources(dev, mask);
 
-	if ((err = pcibios_enable_resources(dev, mask)) < 0)
+	if (err < 0)
 		return err;
 
 	return pcibios_plat_dev_init(dev);