When symbols from overlays are added to the live tree their paths must
be rebased. The translated symbol is normally the result of joining
the fragment-relative path (with a leading "/") to the target path
(either copied directly from the "target-path" property or resolved
from the phandle). This translation fails when the target is the root
node (a common case for Raspberry Pi overlays) because the resulting
path starts with a double slash. For example, if target-path is "/" and
the fragment adds a node called "newnode", the label associated with
that node will be assigned the path "//newnode", which can't be found
in the tree.
Fix the failure case by explicitly replacing a target path of "/" with
an empty string.
Fixes:
d1651b03c2df ("of: overlay: add overlay symbols to live device tree")
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
if (!target_path)
return NULL;
target_path_len = strlen(target_path);
+ if (!strcmp(target_path, "/"))
+ target_path_len = 0;
new_prop = kzalloc(sizeof(*new_prop), GFP_KERNEL);
if (!new_prop)