Re: [PATCH 1/1] PCI set flag PCI_SCAN_ALL_PCIE_DEVS for P.A. Semi boards

[Bjorn Helgaas <helgaas@kernel.org>]

On Fri, Mar 16, 2018 at 01:55:36PM +0100, Christian Zigotzky wrote:
> Bjorn Helgaas created a patch for making PCI_SCAN_ALL_PCIE_DEVS work for
> Root Ports as well as Downstream. Previously PCI_SCAN_ALL_PCIE_DEVS (set by
> quirks or the "pci=pcie_scan_all"
> kernel parameter) only affected Switch Downstream Ports, not Root Ports. The
> problem is, that we have to add always the boot argument "pci=pcie_scan_all"
> for using Bjorn's improvements. Without the boot argument
> "pci=pcie_scan_all", the kernel doesn't boot on P.A. Semi boards with SB600
> chipset (SB600 chipset is connected via PCIe x4 to the P.A. Semi’s
> PA6T-1682M System-on-a-Chip) because the kernel can't find any drives
> connected to the SB600 anymore. Olof Johansson has created a patch for
> executing "pci=pcie_scan_all" automatically on P.A. Semi boards. With his
> patch, we don't need to add 'pci=pcie_scan_all' to the kernel boot arguments
> anymore.

The patch looks fine, but I need a signed-off-by line before I can apply
it.  See https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst

> ---
> 
> arch/powerpc/platforms/pasemi/pci.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/powerpc/platforms/pasemi/pci.c
> b/arch/powerpc/platforms/pasemi/pci.c
> index 5ff6108..ea54ed2 100644
> --- a/arch/powerpc/platforms/pasemi/pci.c
> +++ b/arch/powerpc/platforms/pasemi/pci.c
> @@ -224,6 +224,8 @@ void __init pas_pci_init(void)
>          return;
>      }
> 
> +    pci_set_flags(PCI_SCAN_ALL_PCIE_DEVS);
> +
>      for (np = NULL; (np = of_get_next_child(root, np)) != NULL;)
>          if (np->name && !strcmp(np->name, "pxp") && !pas_add_bridge(np))
>              of_node_get(np);
> 
> --
> 
>