[v4,3/7] um: Unconditionally call unflatten_device_tree()

Commit Message

Stephen Boyd Feb. 17, 2024, 1:05 a.m. UTC

Call this function unconditionally so that we can populate an empty DTB
on platforms that don't boot with a command line provided DTB.  There's
no harm in calling unflatten_device_tree() unconditionally. If there
isn't a valid initial_boot_params dtb then unflatten_device_tree()
returns early.

Cc: Rob Herring <[e-mail]>
Cc: Frank Rowand <[e-mail]>
Cc: Richard Weinberger <[e-mail]>
Cc: Anton Ivanov <[e-mail]>
Cc: Johannes Berg <[e-mail]>
Cc: <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>
---
 arch/um/kernel/dtb.c  | 14 +++++++-------
 drivers/of/unittest.c |  4 ----
 2 files changed, 7 insertions(+), 11 deletions(-)

Patch

diff --git a/arch/um/kernel/dtb.c b/arch/um/kernel/dtb.c
index 484141b06938..4954188a6a09 100644
--- a/arch/um/kernel/dtb.c
+++ b/arch/um/kernel/dtb.c
@@ -16,16 +16,16 @@  void uml_dtb_init(void)
 	void *area;
 
 	area = uml_load_file(dtb, &size);
-	if (!area)
-		return;
+	if (area) {
+		if (!early_init_dt_scan(area)) {
+			pr_err("invalid DTB %s\n", dtb);
+			memblock_free(area, size);
+			return;
+		}
 
-	if (!early_init_dt_scan(area)) {
-		pr_err("invalid DTB %s\n", dtb);
-		memblock_free(area, size);
-		return;
+		early_init_fdt_scan_reserved_mem();
 	}
 
-	early_init_fdt_scan_reserved_mem();
 	unflatten_device_tree();
 }
 
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index cfd60e35a899..891752a20a5f 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -4087,10 +4087,6 @@  static int __init of_unittest(void)
 	add_taint(TAINT_TEST, LOCKDEP_STILL_OK);
 
 	/* adding data for unittest */
-
-	if (IS_ENABLED(CONFIG_UML))
-		unittest_unflatten_overlay_base();
-
 	res = unittest_data_add();
 	if (res)
 		return res;