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

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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: 5b28541552 ("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
This commit is contained in:
Yinghai Lu 2015-01-15 16:21:50 -06:00 committed by Bjorn Helgaas
parent 4e348ba2dd
commit 2e5e804a83
1 changed files with 2 additions and 3 deletions
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5
drivers/parisc/lba_pci.c
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@ -694,9 +694,8 @@ lba_fixup_bus(struct pci_bus *bus)
int i;
/* PCI-PCI Bridge */
pci_read_bridge_bases(bus);
for (i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) {
pci_claim_resource(bus->self, i);
}
for (i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++)
pci_claim_bridge_resource(bus->self, i);
} else {
/* Host-PCI Bridge */
int err;