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backlight: tps65217_bl: Fix Device Tree node lookup

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commit 2b12dfa124 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: eebfdc17cc ("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>
This commit is contained in:
Johan Hovold
2017-11-20 11:45:46 +01:00
committed by Greg Kroah-Hartman
parent a89e596f12
commit 099fae46d8
1 changed files with 2 additions and 2 deletions
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4
drivers/video/backlight/tps65217_bl.c
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@@ -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);