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| author | Bjorn Helgaas <bhelgaas@google.com> | 2013-08-29 06:55:41 +0400 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-08-29 06:55:41 +0400 |
| commit | 2e8b5f621dbe29425906852c6079afb6b28720cb (patch) | |
| tree | 178a58a6dee0599d8b119d6c72969f9b6f4e37ac /drivers/pci/probe.c | |
| parent | 07f2daad094bc9e9770143cd2d619de24d84bb3e (diff) | |
| parent | fed2451512495f0f0820ac9e53936bd208569bc8 (diff) | |
| download | linux-2e8b5f621dbe29425906852c6079afb6b28720cb.tar.xz | |
Merge branch 'pci/misc' into next
* pci/misc:
PCI: Remove pcie_cap_has_devctl()
PCI: Support PCIe Capability Slot registers only for ports with slots
PCI: Remove PCIe Capability version checks
PCI: Allow PCIe Capability link-related register access for switches
PCI: Add offsets of PCIe capability registers
PCI: Tidy bitmasks and spacing of PCIe capability definitions
PCI: Remove obsolete comment reference to pci_pcie_cap2()
PCI: Clarify PCI_EXP_TYPE_PCI_BRIDGE comment
PCI: Rename PCIe capability definitions to follow convention
PCI: Disable decoding for BAR sizing only when it was actually enabled
PCI: Add comment about needing pci_msi_off() even when CONFIG_PCI_MSI=n
PCI: Add pcibios_pm_ops for optional arch-specific hibernate functionality
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index a57762fbe10e..eeb50bd62402 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -156,6 +156,8 @@ static inline unsigned long decode_bar(struct pci_dev *dev, u32 bar) return flags; } +#define PCI_COMMAND_DECODE_ENABLE (PCI_COMMAND_MEMORY | PCI_COMMAND_IO) + /** * pci_read_base - read a PCI BAR * @dev: the PCI device @@ -178,8 +180,10 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, /* No printks while decoding is disabled! */ if (!dev->mmio_always_on) { pci_read_config_word(dev, PCI_COMMAND, &orig_cmd); - pci_write_config_word(dev, PCI_COMMAND, - orig_cmd & ~(PCI_COMMAND_MEMORY | PCI_COMMAND_IO)); + if (orig_cmd & PCI_COMMAND_DECODE_ENABLE) { + pci_write_config_word(dev, PCI_COMMAND, + orig_cmd & ~PCI_COMMAND_DECODE_ENABLE); + } } res->name = pci_name(dev); @@ -293,7 +297,8 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, fail: res->flags = 0; out: - if (!dev->mmio_always_on) + if (!dev->mmio_always_on && + (orig_cmd & PCI_COMMAND_DECODE_ENABLE)) pci_write_config_word(dev, PCI_COMMAND, orig_cmd); if (bar_too_big) |