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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2019-06-15 03:23:58 +0300
committerBjorn Helgaas <bhelgaas@google.com>2019-06-22 02:11:53 +0300
commit7ac0d094fbe95bf7cc96b3066a97e1090ddc734a (patch)
tree3210086341a37002e6bd5cd2a3b054cff71bf67e /drivers/pci/setup-bus.c
parenta78cf9657ba5426f54aa93a067c10d097944c082 (diff)
downloadlinux-7ac0d094fbe95bf7cc96b3066a97e1090ddc734a.tar.xz
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>
Diffstat (limited to 'drivers/pci/setup-bus.c')
-rw-r--r--drivers/pci/setup-bus.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 0cdd5ff389de..d533102b2788 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -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;