Commit 7ac0d094 authored Jun 15, 2019 by Benjamin Herrenschmidt Committed by Bjorn Helgaas Jun 21, 2019

PCI: Don't auto-realloc if we're preserving firmware config

Prevent auto-enabling of bridges reallocation when the FW tells us that the
initial configuration must be preserved for a given host bridge.

Link: https://lore.kernel.org/r/20190615002359.29577-3-benh@kernel.crashing.org

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

parent a78cf965

drivers/pci/setup-bus.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -1684,10 +1684,15 @@ static enum enable_type pci_realloc_detect(struct pci_bus *bus,
		enum enable_type enable_local)
		{
		bool unassigned = false;
		struct pci_host_bridge *host;

		if (enable_local != undefined)
		return enable_local;

		host = pci_find_host_bridge(bus);
		if (host->preserve_config)
		return auto_disabled;

		pci_walk_bus(bus, iov_resources_unassigned, &unassigned);
		if (unassigned)
		return auto_enabled;