Commit 2e5e804a authored by Yinghai Lu's avatar Yinghai Lu Committed by Bjorn Helgaas

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=85491Reported-by: default avatarMarek Kordik <kordikmarek@gmail.com>
Fixes: 5b285415 ("PCI: Restrict 64-bit prefetchable bridge windows to 64-bit resources")
Signed-off-by: default avatarYinghai Lu <yinghai@kernel.org>
Signed-off-by: default avatarBjorn 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
parent 4e348ba2
......@@ -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;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment