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| author | Zhou Wang <wangzhou1@hisilicon.com> | 2017-01-04 08:00:06 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-01-12 21:32:09 +0100 |
| commit | 53762ba810398c11efaf65f9a45d992125e86dcf (patch) | |
| tree | e6f01d279441ef4a9a6c9db11c5f0403b7682026 /block | |
| parent | PCI: Apply _HPX settings only to relevant devices (diff) | |
| download | linux-53762ba810398c11efaf65f9a45d992125e86dcf.tar.xz linux-53762ba810398c11efaf65f9a45d992125e86dcf.zip | |
PCI/ACPI: Fix bus range comparison in pci_mcfg_lookup()
The configuration data provided by an MCFG entry, i.e., PCI segment and bus
range, may span multiple host bridges.
pci_mcfg_lookup() previously required an exact match of the host bridge
starting bus and the MCFG starting bus, which made the following
configuration fail:
MCFG region:
segment: 0
bus range: 0x00-0xff
host bridge
segment: 0
bus range: 0x20-0x4f
Relax the bus range check in pci_mcfg_lookup() so we can use any MCFG entry
that contains the required bus range, as we do in pci_mmconfig_lookup().
[bhelgaas: changelog]
Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Tomasz Nowicki <tn@semihalf.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions