4.4-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan@kernel.org
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
--- drivers/video/backlight/max8925_bl.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/video/backlight/max8925_bl.c +++ b/drivers/video/backlight/max8925_bl.c @@ -116,7 +116,7 @@ static void max8925_backlight_dt_init(st 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(st if (!of_property_read_u32(np, "maxim,max8925-dual-string", &val)) pdata->dual_string = val;
+ of_node_put(np); + pdev->dev.platform_data = pdata; }