[PATCH 8/8] MIPS: pci-legacy: use generic pci_enable_resources

[Ilya Lipnitskiy]

Follow the reasoning from commit 842de40d93e0 ("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 <bhelg...@google.com>
Signed-off-by: Ilya Lipnitskiy <ilya.lipnits...@gmail.com>
---
 arch/mips/pci/pci-legacy.c | 40 ++------------------------------------
 1 file changed, 2 insertions(+), 38 deletions(-)

diff --git a/arch/mips/pci/pci-legacy.c b/arch/mips/pci/pci-legacy.c
index 78c22987bef0..c24226ea0a6e 100644
--- a/arch/mips/pci/pci-legacy.c
+++ b/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);
-- 
2.31.1