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[v6,18/30] PCI: hotplug: Configure MPS for hot-added bridges during bus rescan

Message ID 20191024171228.877974-19-s.miroshnichenko@yadro.com
State New
Delegated to: Bjorn Helgaas
Headers show
Series PCI: Allow BAR movement during hotplug | expand

Commit Message

Sergei Miroshnichenko Oct. 24, 2019, 5:12 p.m. UTC
Assure that MPS settings are set up for bridges which are discovered during
manually triggered rescan via sysfs. This sequence of bridge init (using
pci_rescan_bus()) will be used for pciehp hot-add events when BARs are

Signed-off-by: Sergey Miroshnichenko <s.miroshnichenko@yadro.com>
 drivers/pci/probe.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index d0d00cb3e965..94bbdf9b9dc1 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -3414,7 +3414,7 @@  static void pci_reassign_root_bus_resources(struct pci_bus *root)
 unsigned int pci_rescan_bus(struct pci_bus *bus)
 	unsigned int max;
-	struct pci_bus *root = bus;
+	struct pci_bus *root = bus, *child;
 	while (!pci_is_root_bus(root))
 		root = root->parent;
@@ -3435,6 +3435,9 @@  unsigned int pci_rescan_bus(struct pci_bus *bus)
+	list_for_each_entry(child, &root->children, node)
+		pcie_bus_configure_settings(child);
 	return max;