tree 4bb354ba434d5870c08b16440183792ff717b3d6
parent 3f2f4dc456e9f80849b99d79600a7257690ca4b1
author Yinghai Lu <yinghai@kernel.org> 1421360509 -0600
committer Bjorn Helgaas <bhelgaas@google.com> 1421424282 -0600

PCI: Add pci_bus_clip_resource() to clip to fit upstream window

Add pci_bus_clip_resource().  If a PCI-PCI bridge window overlaps an
upstream bridge window but is not completely contained by it, this clips
the downstream window so it fits inside the upstream one.

No functional change (this adds the function but no callers).

[bhelgaas: changelog, split into separate patch]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=85491
Reported-by: Marek Kordik <kordikmarek@gmail.com>
Fixes: 5b28541552ef ("PCI: Restrict 64-bit prefetchable bridge windows to 64-bit resources")
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org	# v3.16+