From: Rob Herring robh@kernel.org
[ Upstream commit 832ea234277a2465ec6602fa6a4db5cd9ee87ae3 ]
With commit 669cbc708122 ("PCI: Move DT resource setup into devm_pci_alloc_host_bridge()"), the DT 'ranges' is parsed and populated into resources when the host bridge is allocated. The resources are requested as well, but that happens a second time for the mvebu driver in mvebu_pcie_parse_request_resources(). We should only be requesting the additional resources added in mvebu_pcie_parse_request_resources(). These are not added by default because they use custom properties rather than standard DT address translation.
Also, the bus ranges was also populated by default, so we can remove it from mvebu_pci_host_probe().
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=209729 Fixes: 669cbc708122 ("PCI: Move DT resource setup into devm_pci_alloc_host_bridge()") Link: https://lore.kernel.org/r/20201023145252.2691779-1-robh@kernel.org Reported-by: vtolkm@googlemail.com Tested-by: Jan Kundrát jan.kundrat@cesnet.cz Signed-off-by: Rob Herring robh@kernel.org Signed-off-by: Bjorn Helgaas bhelgaas@google.com Acked-by: Lorenzo Pieralisi lorenzo.pieralisi@arm.com Cc: Thomas Petazzoni thomas.petazzoni@bootlin.com Cc: Jason Cooper jason@lakedaemon.net Cc: Russell King linux@armlinux.org.uk Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/controller/pci-mvebu.c | 23 ++++++++++------------- 1 file changed, 10 insertions(+), 13 deletions(-)
diff --git a/drivers/pci/controller/pci-mvebu.c b/drivers/pci/controller/pci-mvebu.c index c39978b750ec6..653c0b3d29125 100644 --- a/drivers/pci/controller/pci-mvebu.c +++ b/drivers/pci/controller/pci-mvebu.c @@ -960,25 +960,16 @@ static void mvebu_pcie_powerdown(struct mvebu_pcie_port *port) }
/* - * We can't use devm_of_pci_get_host_bridge_resources() because we - * need to parse our special DT properties encoding the MEM and IO - * apertures. + * devm_of_pci_get_host_bridge_resources() only sets up translateable resources, + * so we need extra resource setup parsing our special DT properties encoding + * the MEM and IO apertures. */ static int mvebu_pcie_parse_request_resources(struct mvebu_pcie *pcie) { struct device *dev = &pcie->pdev->dev; - struct device_node *np = dev->of_node; struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); int ret;
- /* Get the bus range */ - ret = of_pci_parse_bus_range(np, &pcie->busn); - if (ret) { - dev_err(dev, "failed to parse bus-range property: %d\n", ret); - return ret; - } - pci_add_resource(&bridge->windows, &pcie->busn); - /* Get the PCIe memory aperture */ mvebu_mbus_get_pcie_mem_aperture(&pcie->mem); if (resource_size(&pcie->mem) == 0) { @@ -988,6 +979,9 @@ static int mvebu_pcie_parse_request_resources(struct mvebu_pcie *pcie)
pcie->mem.name = "PCI MEM"; pci_add_resource(&bridge->windows, &pcie->mem); + ret = devm_request_resource(dev, &iomem_resource, &pcie->mem); + if (ret) + return ret;
/* Get the PCIe IO aperture */ mvebu_mbus_get_pcie_io_aperture(&pcie->io); @@ -1001,9 +995,12 @@ static int mvebu_pcie_parse_request_resources(struct mvebu_pcie *pcie) pcie->realio.name = "PCI I/O";
pci_add_resource(&bridge->windows, &pcie->realio); + ret = devm_request_resource(dev, &ioport_resource, &pcie->realio); + if (ret) + return ret; }
- return devm_request_pci_bus_resources(dev, &bridge->windows); + return 0; }
/*