[5/6] of: unittest: treat missing of_root as error instead of fixing up

Commit Message

Stephen Boyd Jan. 12, 2024, 8:07 p.m. UTC

From: Frank Rowand <[e-mail]>

unflatten_device_tree() now ensures that the 'of_root' node is populated
with the root of a default empty devicetree. Remove the unittest code
that created 'of_root' if it was missing. Verify that 'of_root' is valid
before attempting to attach the testcase-data subtree. Remove the
unittest code that unflattens the unittest overlay base if architecture
is UML because that is always done now.

Signed-off-by: Frank Rowand <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Cc: Rob Herring <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>
---
 drivers/of/unittest.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

Patch

diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index a8b27dd16ecf..742d919e8ab4 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -1732,20 +1732,16 @@  static int __init unittest_data_add(void)
 		return -EINVAL;
 	}
 
+	/* attach the sub-tree to live tree */
 	if (!of_root) {
-		of_root = unittest_data_node;
-		for_each_of_allnodes(np)
-			__of_attach_node_sysfs(np);
-		of_aliases = of_find_node_by_path("/aliases");
-		of_chosen = of_find_node_by_path("/chosen");
-		of_overlay_mutex_unlock();
-		return 0;
+		pr_warn("%s: no live tree to attach sub-tree\n", __func__);
+		kfree(unittest_data);
+		return -ENODEV;
 	}
 
 	EXPECT_BEGIN(KERN_INFO,
 		     "Duplicate name in testcase-data, renamed to \"duplicate-name#1\"");
 
-	/* attach the sub-tree to live tree */
 	np = unittest_data_node->child;
 	while (np) {
 		struct device_node *next = np->sibling;