* [PATCH] ARM: OMAP2+: Fix refcount leak in omapdss_init_of
@ 2022-06-01 4:48 Miaoqian Lin
2022-06-01 6:50 ` Laurent Pinchart
0 siblings, 1 reply; 3+ messages in thread
From: Miaoqian Lin @ 2022-06-01 4:48 UTC (permalink / raw)
To: Tony Lindgren, Russell King, Laurent Pinchart, Tomi Valkeinen,
Sebastian Reichel, linux-arm-kernel, linux-omap, linux-kernel
Cc: linmq006
omapdss_find_dss_of_node() calls of_find_compatible_node() to get device
node. of_find_compatible_node() returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
Add missing of_node_put() in later error path and normal path.
Fixes: e0c827aca0730 ("drm/omap: Populate DSS children in omapdss driver")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
arch/arm/mach-omap2/display.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
index 21413a9b7b6c..ed2cb2649cf6 100644
--- a/arch/arm/mach-omap2/display.c
+++ b/arch/arm/mach-omap2/display.c
@@ -259,11 +259,13 @@ static int __init omapdss_init_of(void)
if (!pdev) {
pr_err("Unable to find DSS platform device\n");
+ of_node_put(node);
return -ENODEV;
}
r = of_platform_populate(node, NULL, NULL, &pdev->dev);
put_device(&pdev->dev);
+ of_node_put(node);
if (r) {
pr_err("Unable to populate DSS submodule devices\n");
return r;
--
2.25.1
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] ARM: OMAP2+: Fix refcount leak in omapdss_init_of
2022-06-01 4:48 [PATCH] ARM: OMAP2+: Fix refcount leak in omapdss_init_of Miaoqian Lin
@ 2022-06-01 6:50 ` Laurent Pinchart
2022-06-28 4:36 ` Tony Lindgren
0 siblings, 1 reply; 3+ messages in thread
From: Laurent Pinchart @ 2022-06-01 6:50 UTC (permalink / raw)
To: Miaoqian Lin
Cc: Tony Lindgren, Russell King, Tomi Valkeinen, Sebastian Reichel,
linux-arm-kernel, linux-omap, linux-kernel
Hello Lin,
Thank you for the patch.
On Wed, Jun 01, 2022 at 08:48:58AM +0400, Miaoqian Lin wrote:
> omapdss_find_dss_of_node() calls of_find_compatible_node() to get device
> node. of_find_compatible_node() returns a node pointer with refcount
> incremented, we should use of_node_put() on it when done.
> Add missing of_node_put() in later error path and normal path.
>
> Fixes: e0c827aca0730 ("drm/omap: Populate DSS children in omapdss driver")
> Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
> arch/arm/mach-omap2/display.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
> index 21413a9b7b6c..ed2cb2649cf6 100644
> --- a/arch/arm/mach-omap2/display.c
> +++ b/arch/arm/mach-omap2/display.c
> @@ -259,11 +259,13 @@ static int __init omapdss_init_of(void)
>
> if (!pdev) {
> pr_err("Unable to find DSS platform device\n");
> + of_node_put(node);
> return -ENODEV;
> }
>
> r = of_platform_populate(node, NULL, NULL, &pdev->dev);
> put_device(&pdev->dev);
> + of_node_put(node);
> if (r) {
> pr_err("Unable to populate DSS submodule devices\n");
> return r;
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] ARM: OMAP2+: Fix refcount leak in omapdss_init_of
2022-06-01 6:50 ` Laurent Pinchart
@ 2022-06-28 4:36 ` Tony Lindgren
0 siblings, 0 replies; 3+ messages in thread
From: Tony Lindgren @ 2022-06-28 4:36 UTC (permalink / raw)
To: Laurent Pinchart
Cc: Miaoqian Lin, Russell King, Tomi Valkeinen, Sebastian Reichel,
linux-arm-kernel, linux-omap, linux-kernel
* Laurent Pinchart <laurent.pinchart@ideasonboard.com> [220601 06:46]:
> Hello Lin,
>
> Thank you for the patch.
>
> On Wed, Jun 01, 2022 at 08:48:58AM +0400, Miaoqian Lin wrote:
> > omapdss_find_dss_of_node() calls of_find_compatible_node() to get device
> > node. of_find_compatible_node() returns a node pointer with refcount
> > incremented, we should use of_node_put() on it when done.
> > Add missing of_node_put() in later error path and normal path.
> >
> > Fixes: e0c827aca0730 ("drm/omap: Populate DSS children in omapdss driver")
> > Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Thanks applying this into omap-for-v5.20/soc.
Regards,
Tony
^ permalink raw reply [flat|nested] 3+ messages in thread
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2022-06-01 4:48 [PATCH] ARM: OMAP2+: Fix refcount leak in omapdss_init_of Miaoqian Lin
2022-06-01 6:50 ` Laurent Pinchart
2022-06-28 4:36 ` Tony Lindgren
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