From: Gary Hade Date: Wed, 3 Oct 2007 22:55:51 +0000 (-0700) Subject: PCI: remove transparent bridge sizing X-Git-Tag: v2.6.24-rc1~1393^2~7 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8fa5913d54f3b1e09948e6a0db34da887e05ff1f;p=linux-2.6 PCI: remove transparent bridge sizing Remove transparent bridge sizing. Due to code in pci_read_bridge_bases() [drivers/pci/probe.c] the child bus of a transparent bridge already has access to the parent bus resources so transparent bridge sizing appears unnecessary. The bridge sizing includes alignment and granularity adjustments that can cause significantly more memory to be reserved from the parant bus than required by devices on the child bus and allotted by _CRS. Signed-off-by: Gary Hade Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 5e5191ec8d..401e03c920 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -472,7 +472,12 @@ void pci_bus_size_bridges(struct pci_bus *bus) break; case PCI_CLASS_BRIDGE_PCI: + /* don't size subtractive decoding (transparent) + * PCI-to-PCI bridges */ + if (bus->self->transparent) + break; pci_bridge_check_ranges(bus); + /* fall through */ default: pbus_size_io(bus); /* If the bridge supports prefetchable range, size it