iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

backlight: max8925_bl: Fix Device Tree node lookup

Browse Source 
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>
This commit is contained in:
Johan Hovold 2017-11-20 11:45:45 +01:00 committed by Greg Kroah-Hartman
parent 91a9aaeb5e
commit 1b9ecd3d72
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/video/backlight/max8925_bl.c
View File

@ -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;
}