PCI: Check all IORESOURCE_TYPE_BITS in pci_bus_alloc_from_region()

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When allocating space from a bus resource, i.e., from apertures leading to
this bus, make sure the entire resource type matches.  The previous code
assumed the IORESOURCE_TYPE_BITS field was a bitmask with only a single bit
set, but this is not true.  IORESOURCE_TYPE_BITS is really an enumeration,
and we have to check all the bits.

See 72dcb11972 ("resources: Add register address resource type").

No functional change.  If we used this path for allocating IRQs, DMA
channels, or bus numbers, this would fix a bug because those types are
indistinguishable when masked by IORESOURCE_IO | IORESOURCE_MEM.  But we
don't, so this shouldn't make any difference.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

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Bjorn Helgaas 2014-03-07 13:39:01 -07:00

parent 6404e88e83

commit aa11fc58dc

1 changed files with 1 additions and 1 deletions

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drivers/pci/bus.c

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