PCI: Mark 64-bit resource as IORESOURCE_UNSET if we only support 32-bit
If we don't support 64-bit addresses, i.e., CONFIG_PHYS_ADDR_T_64BIT is not set, we can't deal with BARs above 4GB. In this case we already pretend the BAR contained zero; this patch also sets IORESOURCE_UNSET so we can try to reallocate it later. I don't think this is exactly correct: what we care about here are *bus* addresses, not CPU addresses, so the tests of sizeof(resource_size_t) probably should be on sizeof(dma_addr_t) instead. But this is what's been in -next, so we'll fix that later. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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@ -252,6 +252,7 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
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/* Address above 32-bit boundary; disable the BAR */
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pci_write_config_dword(dev, pos, 0);
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pci_write_config_dword(dev, pos + 4, 0);
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res->flags |= IORESOURCE_UNSET;
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region.start = 0;
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region.end = sz64;
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bar_disabled = true;
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