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MIPS: pci-legacy: use generic pci_enable_resources
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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 <bhelgaas@google.com>
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
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Ilya Lipnitskiy authored and Thomas Bogendoerfer committed Apr 16, 2021
1 parent 0af83d2 commit 99bca61
Showing 1 changed file with 2 additions and 38 deletions.
40 changes: 2 additions & 38 deletions arch/mips/pci/pci-legacy.c
Original file line number Diff line number Diff line change
@@ -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);

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