[PATCH] slimbus: qcom-ngd-ctrl: Add of_node_put() before return

[PATCH] slimbus: qcom-ngd-ctrl: Add of_node_put() before return

[Nishka Dasgupta]

Each iteration of for_each_available_child_of_node puts the previous
node, but in the case of a return from the middle of the loop, there is
no put, thus causing a memory leak. Hence add an of_node_put before the
return in two places.
Issue found with Coccinelle.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
---
 drivers/slimbus/qcom-ngd-ctrl.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c
index f3585777324c..29fbab55c3b3 100644
--- a/drivers/slimbus/qcom-ngd-ctrl.c
+++ b/drivers/slimbus/qcom-ngd-ctrl.c
@@ -1338,12 +1338,15 @@ static int of_qcom_slim_ngd_register(struct device *parent,
 			continue;
 
 		ngd = kzalloc(sizeof(*ngd), GFP_KERNEL);
-		if (!ngd)
+		if (!ngd) {
+			of_node_put(node);
 			return -ENOMEM;
+		}
 
 		ngd->pdev = platform_device_alloc(QCOM_SLIM_NGD_DRV_NAME, id);
 		if (!ngd->pdev) {
 			kfree(ngd);
+			of_node_put(node);
 			return -ENOMEM;
 		}
 		ngd->id = id;
-- 
2.19.1

Re: [PATCH] slimbus: qcom-ngd-ctrl: Add of_node_put() before return

[Bjorn Andersson]

On Sun 04 Aug 09:22 PDT 2019, Nishka Dasgupta wrote:

> Each iteration of for_each_available_child_of_node puts the previous
> node, but in the case of a return from the middle of the loop, there is
> no put, thus causing a memory leak. Hence add an of_node_put before the
> return in two places.
> Issue found with Coccinelle.
> 

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

> Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
> ---
>  drivers/slimbus/qcom-ngd-ctrl.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c
> index f3585777324c..29fbab55c3b3 100644
> --- a/drivers/slimbus/qcom-ngd-ctrl.c
> +++ b/drivers/slimbus/qcom-ngd-ctrl.c
> @@ -1338,12 +1338,15 @@ static int of_qcom_slim_ngd_register(struct device *parent,
>  			continue;
>  
>  		ngd = kzalloc(sizeof(*ngd), GFP_KERNEL);
> -		if (!ngd)
> +		if (!ngd) {
> +			of_node_put(node);
>  			return -ENOMEM;
> +		}
>  
>  		ngd->pdev = platform_device_alloc(QCOM_SLIM_NGD_DRV_NAME, id);
>  		if (!ngd->pdev) {
>  			kfree(ngd);
> +			of_node_put(node);
>  			return -ENOMEM;
>  		}
>  		ngd->id = id;
> -- 
> 2.19.1
> 

Re: [PATCH] slimbus: qcom-ngd-ctrl: Add of_node_put() before return

[Srinivas Kandagatla]

On 04/08/2019 17:22, Nishka Dasgupta wrote:
> Each iteration of for_each_available_child_of_node puts the previous
> node, but in the case of a return from the middle of the loop, there is
> no put, thus causing a memory leak. Hence add an of_node_put before the
> return in two places.
> Issue found with Coccinelle.
> 
> Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
> ---
>   drivers/slimbus/qcom-ngd-ctrl.c | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)

Applied Thanks,


--srini