parisc/PCI: Clip bridge windows to fit in upstream windows
authorYinghai Lu <yinghai@kernel.org>
Thu, 15 Jan 2015 22:21:50 +0000 (16:21 -0600)
committerBjorn Helgaas <bhelgaas@google.com>
Fri, 16 Jan 2015 16:04:43 +0000 (10:04 -0600)
commit2e5e804a836ec89e126443c8efe666b56e4e58a9
tree48be342b20df2de53c954ac87249e7bd14fec2f0
parent4e348ba2dd1c1d6ea191566d7591655bbe9dde64
parisc/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: "James E.J. Bottomley" <jejb@parisc-linux.org>
CC: Helge Deller <deller@gmx.de>
CC: linux-parisc@vger.kernel.org
drivers/parisc/lba_pci.c