Fix bus-node lookup during registration, which ended up searching the whole device tree depth-first starting at the parent (or grand parent) rather than just matching on its children.

To make things worse, the parent (or grand-parent) node could end being prematurely freed as well.

Fixes: ef6a7bcfb01c ("usb: ulpi: Support device discovery via DT") Reported-by: Peter Robinson pbrobinson@gmail.com Reported-by: Stephen Boyd sboyd@codeaurora.org Cc: stable stable@vger.kernel.org # 4.10 Signed-off-by: Johan Hovold johan@kernel.org --- drivers/usb/common/ulpi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/common/ulpi.c b/drivers/usb/common/ulpi.c index 8b351444cc40..9a2ab6751a23 100644 --- a/drivers/usb/common/ulpi.c +++ b/drivers/usb/common/ulpi.c @@ -180,9 +180,9 @@ static int ulpi_of_register(struct ulpi *ulpi) /* Find a ulpi bus underneath the parent or the grandparent */ parent = ulpi->dev.parent; if (parent->of_node) - np = of_find_node_by_name(parent->of_node, "ulpi"); + np = of_get_child_by_name(parent->of_node, "ulpi"); else if (parent->parent && parent->parent->of_node) - np = of_find_node_by_name(parent->parent->of_node, "ulpi"); + np = of_get_child_by_name(parent->parent->of_node, "ulpi"); if (!np) return 0;