4.14-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan@kernel.org
commit 33c309ebc797b908029fd3a0851aefe697e9b598 upstream.
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 Signed-off-by: Johan Hovold johan@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/common/ulpi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/usb/common/ulpi.c +++ b/drivers/usb/common/ulpi.c @@ -183,9 +183,9 @@ static int ulpi_of_register(struct 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;