[PATCH 7/9] PCI: rockchip: Protect root bus removal with rescan lock

[Hans Zhang]

In rockchip_pcie_remove(), use PCI rescan lock to serialize root bus
deletion against concurrent bus rescan operations.

Signed-off-by: Hans Zhang <18255117159@xxxxxxx>
---
 drivers/pci/controller/pcie-rockchip-host.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pci/controller/pcie-rockchip-host.c b/drivers/pci/controller/pcie-rockchip-host.c
index ee1822ca01db..d203c4876d30 100644
--- a/drivers/pci/controller/pcie-rockchip-host.c
+++ b/drivers/pci/controller/pcie-rockchip-host.c
@@ -1012,8 +1012,10 @@ static void rockchip_pcie_remove(struct platform_device *pdev)
 	struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
 	struct pci_host_bridge *bridge = pci_host_bridge_from_priv(rockchip);
 
+	pci_lock_rescan_remove();
 	pci_stop_root_bus(bridge->bus);
 	pci_remove_root_bus(bridge->bus);
+	pci_unlock_rescan_remove();
 	irq_domain_remove(rockchip->irq_domain);
 
 	rockchip_pcie_deinit_phys(rockchip);
-- 
2.34.1