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authorJohan Hovold <johan@kernel.org>2017-11-11 18:38:44 +0300
committerLee Jones <lee.jones@linaro.org>2017-11-29 19:29:36 +0300
commit85e9b13cbb130a3209f21bd7933933399c389ffe (patch)
tree697601b0a1b1d5da36e8d7f9a57f30e3ced70830
parent0a423772de2f3d7b00899987884f62f63ae00dcb (diff)
downloadlinux-85e9b13cbb130a3209f21bd7933933399c389ffe.tar.xz
mfd: twl6040: Fix child-node lookup
Fix child-node lookup during probe, which ended up searching the whole device tree depth-first starting at the parent rather than just matching on its children. To make things worse, the parent node was prematurely freed, while the child node was leaked. Note that the CONFIG_OF compile guard can be removed as of_get_child_by_name() provides a !CONFIG_OF implementation which always fails. Cc: stable <stable@vger.kernel.org> # 3.5 Fixes: 37e13cecaa14 ("mfd: Add support for Device Tree to twl6040") Fixes: ca2cad6ae38e ("mfd: Fix twl6040 build failure") Signed-off-by: Johan Hovold <johan@kernel.org> Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
-rw-r--r--drivers/mfd/twl6040.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c
index d66502d36ba0..dd19f17a1b63 100644
--- a/drivers/mfd/twl6040.c
+++ b/drivers/mfd/twl6040.c
@@ -97,12 +97,16 @@ static struct reg_sequence twl6040_patch[] = {
};
-static bool twl6040_has_vibra(struct device_node *node)
+static bool twl6040_has_vibra(struct device_node *parent)
{
-#ifdef CONFIG_OF
- if (of_find_node_by_name(node, "vibra"))
+ struct device_node *node;
+
+ node = of_get_child_by_name(parent, "vibra");
+ if (node) {
+ of_node_put(node);
return true;
-#endif
+ }
+
return false;
}