Hi Yinghai,
> On Thu, Oct 10, 2013 at 7:18 PM, Marek Vasut <marex@xxxxxxx> wrote:
> > And so does the probe log (but the pcieport failure still persists):
> >
> >
> > pci_bus 0000:04: bus scan returning with max=04
> > pci_bus 0000:04: busn_res: [bus 04-ff] end is updated to 04
> > pci_bus 0000:02: bus scan returning with max=04
> > pci_bus 0000:02: busn_res: [bus 02-ff] end is updated to 04
> > pci_bus 0000:01: bus scan returning with max=04
> > pci_bus 0000:01: busn_res: [bus 01-ff] end is updated to 04
> > pci_bus 0000:00: bus scan returning with max=04
> > pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 04
> > PCI: Device 0000:00:00.0 not available because of resource collisions
> > pcieport: probe of 0000:00:00.0 failed with error -22
>
> load pcieport driver too early.
OK
[...]
> > pci_bus 0000:00: resource 4 [io 0x1000-0x10000]
> > pci_bus 0000:00: resource 5 [mem 0x01000000-0x01efffff]
> > pci_bus 0000:01: resource 0 [io 0x1000-0x1fff]
> > pci_bus 0000:01: resource 1 [mem 0x01000000-0x01bfffff]
> > pci_bus 0000:02: resource 0 [io 0x1000-0x1fff]
> > pci_bus 0000:02: resource 1 [mem 0x01000000-0x01bfffff]
> > pci_bus 0000:03: resource 0 [io 0x1000-0x1fff]
> > pci_bus 0000:03: resource 1 [mem 0x01000000-0x01bfffff]
>
> Looks your arch call pci_assign_unassigned_resources() too late.
>
> you should have call it with fs_initcall()...
You're right, the pci_assign_unassigned_resources() is called from probe() call
of the MX6 PCIe driver, which is called from module_init().
imx6_pcie_init() -> imx6_pcie_probe() -> imx6_add_pcie_port() ->
dw_pcie_host_init() -> pci_assign_unassigned_resources()
> please try to boot with "debug ignore_loglevel initcall_debug" to sort out
> the initcall sequence.
Yes, probing the MX6 PCIe driver in fs_initcall() actually fixed my issues:
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
index 32b30ca..771892a 100644
--- a/drivers/pci/host/pci-imx6.c
+++ b/drivers/pci/host/pci-imx6.c
@@ -587,7 +590,7 @@ static int __init imx6_pcie_init(void)
{
return platform_driver_probe(&imx6_pcie_driver, imx6_pcie_probe);
}
-module_init(imx6_pcie_init);
+fs_initcall(imx6_pcie_init);
MODULE_AUTHOR("Sean Cross <xobs@xxxxxxxxxx>");
MODULE_DESCRIPTION("Freescale i.MX6 PCIe host controller driver");
Best regards,
Marek Vasut
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