2022-05-28 19:51:46

by Miaoqian Lin

Subject: [PATCH] soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe

of_find_matching_node() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.

In brcmstb_init_sram, it pass dn to of_address_to_resource(),
of_address_to_resource() will call of_find_device_by_node() to take
reference, so we should release the reference returned by
of_find_matching_node().

Fixes: 0b741b8234c8 ("soc: bcm: brcmstb: Add support for S2/S3/S5 suspend states (ARM)")
Signed-off-by: Miaoqian Lin <[email protected]>
---
drivers/soc/bcm/brcmstb/pm/pm-arm.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/soc/bcm/brcmstb/pm/pm-arm.c b/drivers/soc/bcm/brcmstb/pm/pm-arm.c
index 3cbb165d6e30..70ad0f3dce28 100644
--- a/drivers/soc/bcm/brcmstb/pm/pm-arm.c
+++ b/drivers/soc/bcm/brcmstb/pm/pm-arm.c
@@ -783,6 +783,7 @@ static int brcmstb_pm_probe(struct platform_device *pdev)
}

ret = brcmstb_init_sram(dn);
+ of_node_put(dn);
if (ret) {
pr_err("error setting up SRAM for PM\n");
return ret;
--
2.25.1

2022-06-08 10:23:01

by Florian Fainelli

Subject: Re: [PATCH] soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe

On Thu, 26 May 2022 11:53:22 +0400, Miaoqian Lin <[email protected]> wrote:
> of_find_matching_node() returns a node pointer with refcount
> incremented, we should use of_node_put() on it when not need anymore.
> Add missing of_node_put() to avoid refcount leak.
>
> In brcmstb_init_sram, it pass dn to of_address_to_resource(),
> of_address_to_resource() will call of_find_device_by_node() to take
> reference, so we should release the reference returned by
> of_find_matching_node().
>
> Fixes: 0b741b8234c8 ("soc: bcm: brcmstb: Add support for S2/S3/S5 suspend states (ARM)")
> Signed-off-by: Miaoqian Lin <[email protected]>
> ---

Applied to https://github.com/Broadcom/stblinux/commits/drivers/fixes, thanks!
--
Florian