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| author | Bjorn Helgaas <bhelgaas@google.com> | 2016-03-15 14:56:28 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-03-15 14:56:28 +0100 |
| commit | 6e6f498b039aa5558c7377fbbe65f7421d34cea4 (patch) | |
| tree | 7425c95a17f779b1ecb03810bbfe24cab6387f48 /drivers/pci/probe.c | |
| parent | Merge branch 'pci/host-hv' into next (diff) | |
| parent | PCI: Simplify pci_create_attr() control flow (diff) | |
| download | linux-6e6f498b039aa5558c7377fbbe65f7421d34cea4.tar.xz linux-6e6f498b039aa5558c7377fbbe65f7421d34cea4.zip | |
Merge branch 'pci/resource' into next
* pci/resource:
PCI: Simplify pci_create_attr() control flow
PCI: Don't leak memory if sysfs_create_bin_file() fails
PCI: Simplify sysfs ROM cleanup
PCI: Remove unused IORESOURCE_ROM_COPY and IORESOURCE_ROM_BIOS_COPY
MIPS: Loongson 3: Keep CPU physical (not virtual) addresses in shadow ROM resource
MIPS: Loongson 3: Use temporary struct resource * to avoid repetition
ia64/PCI: Keep CPU physical (not virtual) addresses in shadow ROM resource
ia64/PCI: Use ioremap() instead of open-coded equivalent
ia64/PCI: Use temporary struct resource * to avoid repetition
PCI: Clean up pci_map_rom() whitespace
PCI: Remove arch-specific IORESOURCE_ROM_SHADOW size from sysfs
PCI: Set ROM shadow location in arch code, not in PCI core
PCI: Don't enable/disable ROM BAR if we're using a RAM shadow copy
PCI: Don't assign or reassign immutable resources
PCI: Mark shadow copy of VGA ROM as IORESOURCE_PCI_FIXED
x86/PCI: Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs
PCI: Disable IO/MEM decoding for devices with non-compliant BARs
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index c4e1eff8b07c..8004f67c57ec 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -179,6 +179,9 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, u16 orig_cmd; struct pci_bus_region region, inverted_region; + if (dev->non_compliant_bars) + return 0; + mask = type ? PCI_ROM_ADDRESS_MASK : ~0; /* No printks while decoding is disabled! */ @@ -1191,6 +1194,7 @@ static void pci_msi_setup_pci_dev(struct pci_dev *dev) int pci_setup_device(struct pci_dev *dev) { u32 class; + u16 cmd; u8 hdr_type; int pos = 0; struct pci_bus_region region; @@ -1234,6 +1238,16 @@ int pci_setup_device(struct pci_dev *dev) /* device class may be changed after fixup */ class = dev->class >> 8; + if (dev->non_compliant_bars) { + pci_read_config_word(dev, PCI_COMMAND, &cmd); + if (cmd & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) { + dev_info(&dev->dev, "device has non-compliant BARs; disabling IO/MEM decoding\n"); + cmd &= ~PCI_COMMAND_IO; + cmd &= ~PCI_COMMAND_MEMORY; + pci_write_config_word(dev, PCI_COMMAND, cmd); + } + } + switch (dev->hdr_type) { /* header type */ case PCI_HEADER_TYPE_NORMAL: /* standard header */ if (class == PCI_CLASS_BRIDGE_PCI) |