tree 59ca31255f34a5e018776512bad5841b9c4e4e01
parent b3e118224c011b885ef8331bd5b341f15b3bd69a
author Yinghai Lu <yinghai@kernel.org> 1421360509 -0600
committer Bjorn Helgaas <bhelgaas@google.com> 1421424282 -0600

frv/PCI: Clip bridge windows to fit in upstream windows

Every PCI-PCI bridge window should fit inside an upstream bridge window
because orphaned address space is unreachable from the primary side of the
upstream bridge.  If we inherit invalid bridge windows that overlap an
upstream window from firmware, clip them to fit and update the bridge
accordingly.

[bhelgaas: changelog]
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: David Howells <dhowells@redhat.com>
CC: Paul Gortmaker <paul.gortmaker@windriver.com>