smbios: Do not look up children of invalid nodes
If there is no UCLASS_SYSINFO device available, parent_node will be
ofnode_null(). Calling ofnode_find_subnode() then triggers an assertion:
drivers/core/ofnode.c:598: ofnode_find_subnode: Assertion `ofnode_valid(node)' failed.
Check for a valid parent_node, not just that OF_CONTROL is enabled.
Fixes: 44ffb6f0ecaf ("smbios: Allow properties to come from the device tree")
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
diff --git a/lib/smbios.c b/lib/smbios.c
index 7c9701a..b8c2846 100644
--- a/lib/smbios.c
+++ b/lib/smbios.c
@@ -950,7 +950,7 @@
ctx.subnode_name = NULL;
if (method->subnode_name) {
ctx.subnode_name = method->subnode_name;
- if (IS_ENABLED(CONFIG_OF_CONTROL))
+ if (ofnode_valid(parent_node))
ctx.node = ofnode_find_subnode(parent_node,
method->subnode_name);
}