PCI: Disable all BAR sizing for devices with non-compliant BARs
b84106b4e2
("PCI: Disable IO/MEM decoding for devices with non-compliant BARs") disabled BAR sizing for BARs 0-5 of devices that don't comply with the PCI spec. But it didn't do anything for expansion ROM BARs, so we still try to size them, resulting in warnings like this on Broadwell-EP: pci 0000:ff:12.0: BAR 6: failed to assign [mem size 0x00000001 pref] Move the non-compliant BAR check from __pci_read_base() up to pci_read_bases() so it applies to the expansion ROM BAR as well as to BARs 0-5. Note that direct callers of __pci_read_base(), like sriov_init(), will now bypass this check. We haven't had reports of devices with broken SR-IOV BARs yet. [bhelgaas: changelog] Fixes:b84106b4e2
("PCI: Disable IO/MEM decoding for devices with non-compliant BARs") Signed-off-by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org CC: Thomas Gleixner <tglx@linutronix.de> CC: Ingo Molnar <mingo@redhat.com> CC: "H. Peter Anvin" <hpa@zytor.com> CC: Andi Kleen <ak@linux.intel.com>
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@ -179,9 +179,6 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
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u16 orig_cmd;
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u16 orig_cmd;
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struct pci_bus_region region, inverted_region;
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struct pci_bus_region region, inverted_region;
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if (dev->non_compliant_bars)
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return 0;
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mask = type ? PCI_ROM_ADDRESS_MASK : ~0;
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mask = type ? PCI_ROM_ADDRESS_MASK : ~0;
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/* No printks while decoding is disabled! */
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/* No printks while decoding is disabled! */
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@ -322,6 +319,9 @@ static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom)
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{
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{
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unsigned int pos, reg;
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unsigned int pos, reg;
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if (dev->non_compliant_bars)
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return;
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for (pos = 0; pos < howmany; pos++) {
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for (pos = 0; pos < howmany; pos++) {
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struct resource *res = &dev->resource[pos];
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struct resource *res = &dev->resource[pos];
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reg = PCI_BASE_ADDRESS_0 + (pos << 2);
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reg = PCI_BASE_ADDRESS_0 + (pos << 2);
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