4.9-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan@kernel.org
commit 2b12dfa124dbadf391cb9a616aaa6b056823bf75 upstream.
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.
This would only cause trouble if the child node is missing while there is an unrelated node named "backlight" elsewhere in the tree.
Cc: stable stable@vger.kernel.org # 3.7 Fixes: eebfdc17cc6c ("backlight: Add TPS65217 WLED driver") Signed-off-by: Johan Hovold johan@kernel.org Acked-by: Daniel Thompson daniel.thompson@linaro.org Signed-off-by: Lee Jones lee.jones@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/video/backlight/tps65217_bl.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/video/backlight/tps65217_bl.c +++ b/drivers/video/backlight/tps65217_bl.c @@ -184,11 +184,11 @@ static struct tps65217_bl_pdata * tps65217_bl_parse_dt(struct platform_device *pdev) { struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); - struct device_node *node = of_node_get(tps->dev->of_node); + struct device_node *node; struct tps65217_bl_pdata *pdata, *err; u32 val;
- node = of_find_node_by_name(node, "backlight"); + node = of_get_child_by_name(tps->dev->of_node, "backlight"); if (!node) return ERR_PTR(-ENODEV);