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authorBjorn Helgaas <bhelgaas@google.com>2014-03-07 13:39:01 -0700
committerBjorn Helgaas <bhelgaas@google.com>2014-03-19 15:00:16 -0600
commitaa11fc58dc71c27701b1f9a529a36a38d4337722 (patch)
tree626a75fa7f73d6c078c637a0404f4079b61be2f3 /drivers/pci
parent6404e88e8385638123f4b18b104430480870601a (diff)
downloadop-kernel-dev-aa11fc58dc71c27701b1f9a529a36a38d4337722.zip
op-kernel-dev-aa11fc58dc71c27701b1f9a529a36a38d4337722.tar.gz
PCI: Check all IORESOURCE_TYPE_BITS in pci_bus_alloc_from_region()
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 72dcb1197228 ("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>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/bus.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 3890166..e3bdc88 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -144,7 +144,7 @@ static int pci_bus_alloc_from_region(struct pci_bus *bus, struct resource *res,
struct resource *r, avail;
resource_size_t max;
- type_mask |= IORESOURCE_IO | IORESOURCE_MEM;
+ type_mask |= IORESOURCE_TYPE_BITS;
pci_bus_for_each_resource(bus, r, i) {
if (!r)
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