Bjorn Helgaas [off-list ref] writes:

On Fri, Mar 16, 2018 at 01:55:36PM +0100, Christian Zigotzky wrote:

quoted

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

quoted

quirks or the "pci=3Dpcie_scan_all"
kernel parameter) only affected Switch Downstream Ports, not Root Ports.=

 The

quoted

problem is, that we have to add always the boot argument "pci=3Dpcie_sca=

n_all"

quoted

for using Bjorn's improvements. Without the boot argument
"pci=3Dpcie_scan_all", the kernel doesn't boot on P.A. Semi boards with =

SB600

quoted

chipset (SB600 chipset is connected via PCIe x4 to the P.A. Semi=E2=80=

=99s

quoted

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=3Dpcie_scan_all" automatically on P.A. Semi boards. With =

his

quoted

patch, we don't need to add 'pci=3Dpcie_scan_all' to the kernel boot arg=

uments

quoted

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.g=

it/tree/Documentation/process/submitting-patches.rst

I'm happy to take it, I've been meaning to check if Olof sent a SOB in
his original mail but haven't got to it.

...

Yes, he did, see below.

So I'll merge that, I'll add a Tested-by for you Christian.

Christian please don't remove any of the tags when submitting other
peoples' patches in future.

cheers

From a3b390277627b0342c8ccfc16e58679e0d8abdde Mon Sep 17 00:00:00 2001

From: Olof Johansson <redacted>
Date: Sat, 2 Dec 2017 14:56:36 -0800
Subject: [PATCH] powerpc/pasemi: set PCI_SCAN_ALL_PCI_DEVS

Needed on Amiga X1000 with SB600.

Reported-by: Christian Zigotzky <redacted>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Olof Johansson <redacted>
---
 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/p=

asemi/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_flag(PCI_SCAN_ALL_PCIE_DEVS):
+
	for (np =3D NULL; (np =3D of_get_next_child(root, np)) !=3D NULL;)
		if (np->name && !strcmp(np->name, "pxp") && !pas_add_bridge(np))
			of_node_get(np);