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authorJohan Hovold <johan@kernel.org>2017-11-20 11:45:45 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-07-03 11:25:00 +0200
commitf893fca0a4b5ac0ea6003945e791486eac32b90c (patch)
tree47d9e0afa2bb0901d90f21c6523acb3555b68659
parent3db7c40093f6dc58fdfaf2723980955dedadf0a3 (diff)
downloadlinux-linaro-stable-f893fca0a4b5ac0ea6003945e791486eac32b90c.tar.gz
backlight: max8925_bl: Fix Device Tree node lookup
commit d1cc0ec3da23e44c23712579515494b374f111c9 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. To make things worse, the parent mfd node was also prematurely freed, while the child backlight node was leaked. Cc: stable <stable@vger.kernel.org> # 3.9 Fixes: 47ec340cb8e2 ("mfd: max8925: Support dt for backlight") 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>
-rw-r--r--drivers/video/backlight/max8925_bl.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/video/backlight/max8925_bl.c b/drivers/video/backlight/max8925_bl.c
index 7b738d60ecc2..f3aa6088f1d9 100644
--- a/drivers/video/backlight/max8925_bl.c
+++ b/drivers/video/backlight/max8925_bl.c
@@ -116,7 +116,7 @@ static void max8925_backlight_dt_init(struct platform_device *pdev)
if (!pdata)
return;
- np = of_find_node_by_name(nproot, "backlight");
+ np = of_get_child_by_name(nproot, "backlight");
if (!np) {
dev_err(&pdev->dev, "failed to find backlight node\n");
return;
@@ -125,6 +125,8 @@ static void max8925_backlight_dt_init(struct platform_device *pdev)
if (!of_property_read_u32(np, "maxim,max8925-dual-string", &val))
pdata->dual_string = val;
+ of_node_put(np);
+
pdev->dev.platform_data = pdata;
}