Re: [PATCH] hwmon: ads1015.c: Add of_node_put() before return

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On Sat, Jul 06, 2019 at 06:53:57PM +0530, Nishka Dasgupta wrote:
> Each iteration of for_each_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@xxxxxxxxx>

The ads1015 driver is about to be removed from the hwmon subsystem
in v5.4 (see https://patchwork.kernel.org/patch/11026555/), so I won't
apply any cleanup patches to it.

Thanks,
Guenter

> ---
>  drivers/hwmon/ads1015.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/hwmon/ads1015.c b/drivers/hwmon/ads1015.c
> index 3727a3762eb8..a0d62f6fa4b6 100644
> --- a/drivers/hwmon/ads1015.c
> +++ b/drivers/hwmon/ads1015.c
> @@ -195,6 +195,7 @@ static int ads1015_get_channels_config_of(struct i2c_client *client)
>  			if (pga > 6) {
>  				dev_err(&client->dev, "invalid gain on %pOF\n",
>  					node);
> +				of_node_put(node);
>  				return -EINVAL;
>  			}
>  		}
> @@ -204,6 +205,7 @@ static int ads1015_get_channels_config_of(struct i2c_client *client)
>  			if (data_rate > 7) {
>  				dev_err(&client->dev,
>  					"invalid data_rate on %pOF\n", node);
> +				of_node_put(node);
>  				return -EINVAL;
>  			}
>  		}



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