From fe23274f72f4e3be93134aac0ae1e1fd522f438a Mon Sep 17 00:00:00 2001 From: Jisheng Zhang Date: Fri, 29 Mar 2019 11:59:26 +0000 Subject: PCI: dwc: Save root bus for driver remove hooks Currently DWC host does not support the remove callback, but nothing prevents us from supporting it. Save the root bus for clean up work in driver remove code paths to allow DWC host drivers to implement their remove hook as, eg: static int foo_pcie_remove(struct platform_device *pdev) { ... pci_stop_root_bus(pp->root_bus); pci_remove_root_bus(pp->root_bus); dw_pcie_free_msi(pp); ... } Signed-off-by: Jisheng Zhang Signed-off-by: Lorenzo Pieralisi Signed-off-by: Bjorn Helgaas Acked-by: Gustavo Pimentel --- drivers/pci/controller/dwc/pcie-designware-host.c | 12 ++++++------ drivers/pci/controller/dwc/pcie-designware.h | 1 + 2 files changed, 7 insertions(+), 6 deletions(-) (limited to 'drivers/pci') diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index dcc7405aff9a..3e4169e738a5 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -341,7 +341,7 @@ int dw_pcie_host_init(struct pcie_port *pp) struct device_node *np = dev->of_node; struct platform_device *pdev = to_platform_device(dev); struct resource_entry *win, *tmp; - struct pci_bus *bus, *child; + struct pci_bus *child; struct pci_host_bridge *bridge; struct resource *cfg_res; int ret; @@ -496,18 +496,18 @@ int dw_pcie_host_init(struct pcie_port *pp) if (ret) goto err_free_msi; - bus = bridge->bus; + pp->root_bus = bridge->bus; if (pp->ops->scan_bus) pp->ops->scan_bus(pp); - pci_bus_size_bridges(bus); - pci_bus_assign_resources(bus); + pci_bus_size_bridges(pp->root_bus); + pci_bus_assign_resources(pp->root_bus); - list_for_each_entry(child, &bus->children, node) + list_for_each_entry(child, &pp->root_bus->children, node) pcie_bus_configure_settings(child); - pci_bus_add_devices(bus); + pci_bus_add_devices(pp->root_bus); return 0; err_free_msi: diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 6fb0a1879932..adff0c713665 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -182,6 +182,7 @@ struct pcie_port { struct page *msi_page; u32 num_vectors; u32 irq_mask[MAX_MSI_CTRLS]; + struct pci_bus *root_bus; raw_spinlock_t lock; DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS); }; -- cgit v1.2.3-59-g8ed1b