4.17-stable review patch. If anyone has any objections, please let me know.
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From: Julia Lawall Julia.Lawall@lip6.fr
[ Upstream commit 21816364715f508c10da1e087e352bc1e326614f ]
The device node iterators perform an of_node_get on each iteration, so a jump out of the loop requires an of_node_put.
The semantic patch that fixes this problem is as follows (http://coccinelle.lip6.fr):
// <smpl> @@ expression root,e; local idexpression child; iterator name for_each_child_of_node; @@
for_each_child_of_node(root, child) { ... when != of_node_put(child) when != e = child + of_node_put(child); ? break; ... } ... when != child // </smpl>
Signed-off-by: Julia Lawall Julia.Lawall@lip6.fr Acked-by: Ludovic Desroches ludovic.desroches@microchip.com Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pinctrl/pinctrl-at91-pio4.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/pinctrl/pinctrl-at91-pio4.c +++ b/drivers/pinctrl/pinctrl-at91-pio4.c @@ -576,8 +576,10 @@ static int atmel_pctl_dt_node_to_map(str for_each_child_of_node(np_config, np) { ret = atmel_pctl_dt_subnode_to_map(pctldev, np, map, &reserved_maps, num_maps); - if (ret < 0) + if (ret < 0) { + of_node_put(np); break; + } } }