From: Bjorn Helgaas <bhelgaas@google.com>
Date: Fri, 7 Mar 2014 20:39:01 +0000 (-0700)
Subject: PCI: Check all IORESOURCE_TYPE_BITS in pci_bus_alloc_from_region()
X-Git-Tag: v3.15-rc1~143^2^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aa11fc58dc71c27701b1f9a529a36a38d4337722;p=pandora-kernel.git

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>
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