[coreboot-gerrit] Change in ...coreboot[master]: [WIP] Fix amdfam10 regression on dev_find_slot() removal

[Kyösti Mälkki (Code Review)]

Kyösti Mälkki has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/30695

Change subject: [WIP] Fix amdfam10 regression on dev_find_slot() removal
......................................................................

[WIP] Fix amdfam10 regression on dev_find_slot() removal

For these platforms, the first PCI node on devicetree
is not the root of PCI bus hierarchy.

Change-Id: I19745c3070c12e562ffab2f0243c9d91dd051c72
Signed-off-by: Kyösti Mälkki 
---
M src/device/device_const.c
1 file changed, 15 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/95/30695/1

diff --git a/src/device/device_const.c b/src/device/device_const.c
index ec128e8..53a23ca 100644
--- a/src/device/device_const.c
+++ b/src/device/device_const.c
@@ -190,7 +190,22 @@
    pci_domain = dev_find_path(NULL, DEVICE_PATH_DOMAIN);
    if (!pci_domain)
    	return NULL;
+
+#if !IS_ENABLED(CONFIG_NORTHBRIDGE_AMD_AMDFAM10)
    return pcidev_path_behind(pci_domain->link_list, devfn);
+#else
+	DEVTREE_CONST struct device *rootnode, *dev;
+	DEVTREE_CONST struct bus *bus;
+
+	rootnode = pcidev_path_behind(pci_domain->link_list, PCI_DEVFN(0x18, 0));
+
+	for (bus = rootnode->link_list; bus; bus = bus->next) {
+		dev = pcidev_path_behind(bus, devfn);
+		if (dev)
+			return dev;
+	}
+	return NULL;
+#endif
 }

DEVTREE_CONST struct device *pcidev_on_root(uint8_t dev, uint8_t fn)