pinctrl: mediatek: fix a memleak when do dt maps.
diff mbox

Message ID 1447799622-3340-1-git-send-email-hongzhou.yang@mediatek.com
State New
Headers show

Commit Message

Hongzhou Yang Nov. 17, 2015, 10:33 p.m. UTC
configs will kmemdup to dup_configs in pictrl util function.
So configs need to be freed.

Signed-off-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
---
 Fix a memleak issue.
 According to Yingjoe's comment, add return checek for pinconf_generic_parse_dt_config.

 drivers/pinctrl/mediatek/pinctrl-mtk-common.c |   27 ++++++++++++++++---------
 1 file changed, 17 insertions(+), 10 deletions(-)

Comments

Yingjoe Chen Nov. 18, 2015, 3:22 a.m. UTC | #1
On Tue, 2015-11-17 at 14:33 -0800, Hongzhou Yang wrote:
> configs will kmemdup to dup_configs in pictrl util function.
> So configs need to be freed.
> 
> Signed-off-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
> Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
> ---
>  Fix a memleak issue.
>  According to Yingjoe's comment, add return checek for pinconf_generic_parse_dt_config.

Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com>

Joe.C

>  drivers/pinctrl/mediatek/pinctrl-mtk-common.c |   27 ++++++++++++++++---------
>  1 file changed, 17 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> index 5c71727..8db7cdf 100644
> --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> @@ -509,6 +509,9 @@ static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
>  
>  	err = pinconf_generic_parse_dt_config(node, pctldev, &configs,
>  		&num_configs);
> +	if (err)
> +		return err;
> +
>  	if (num_configs)
>  		has_config = 1;
>  
> @@ -520,21 +523,23 @@ static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
>  	if (has_config && num_pins >= 1)
>  		maps_per_pin++;
>  
> -	if (!num_pins || !maps_per_pin)
> -		return -EINVAL;
> +	if (!num_pins || !maps_per_pin) {
> +		err = -EINVAL;
> +		goto exit;
> +	}
>  
>  	reserve = num_pins * maps_per_pin;
>  
>  	err = pinctrl_utils_reserve_map(pctldev, map,
>  			reserved_maps, num_maps, reserve);
>  	if (err < 0)
> -		goto fail;
> +		goto exit;
>  
>  	for (i = 0; i < num_pins; i++) {
>  		err = of_property_read_u32_index(node, "pinmux",
>  				i, &pinfunc);
>  		if (err)
> -			goto fail;
> +			goto exit;
>  
>  		pin = MTK_GET_PIN_NO(pinfunc);
>  		func = MTK_GET_PIN_FUNC(pinfunc);
> @@ -543,20 +548,21 @@ static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
>  				func >= ARRAY_SIZE(mtk_gpio_functions)) {
>  			dev_err(pctl->dev, "invalid pins value.\n");
>  			err = -EINVAL;
> -			goto fail;
> +			goto exit;
>  		}
>  
>  		grp = mtk_pctrl_find_group_by_pin(pctl, pin);
>  		if (!grp) {
>  			dev_err(pctl->dev, "unable to match pin %d to group\n",
>  					pin);
> -			return -EINVAL;
> +			err = -EINVAL;
> +			goto exit;
>  		}
>  
>  		err = mtk_pctrl_dt_node_to_map_func(pctl, pin, func, grp, map,
>  				reserved_maps, num_maps);
>  		if (err < 0)
> -			goto fail;
> +			goto exit;
>  
>  		if (has_config) {
>  			err = pinctrl_utils_add_map_configs(pctldev, map,
> @@ -564,13 +570,14 @@ static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
>  					configs, num_configs,
>  					PIN_MAP_TYPE_CONFIGS_GROUP);
>  			if (err < 0)
> -				goto fail;
> +				goto exit;
>  		}
>  	}
>  
> -	return 0;
> +	err = 0;
>  
> -fail:
> +exit:
> +	kfree(configs);
>  	return err;
>  }
>  


--
To unsubscribe from this list: send the line "unsubscribe linux-gpio" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Linus Walleij Nov. 29, 2015, 9:35 p.m. UTC | #2
On Tue, Nov 17, 2015 at 11:33 PM, Hongzhou Yang
<hongzhou.yang@mediatek.com> wrote:

> configs will kmemdup to dup_configs in pictrl util function.
> So configs need to be freed.
>
> Signed-off-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
> Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
> ---
>  Fix a memleak issue.
>  According to Yingjoe's comment, add return checek for pinconf_generic_parse_dt_config.

Patch applied with Yingjoe's review tag.

Yours,
Linus Walleij
--
To unsubscribe from this list: send the line "unsubscribe linux-gpio" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Patch
diff mbox

diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
index 5c71727..8db7cdf 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
@@ -509,6 +509,9 @@  static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 
 	err = pinconf_generic_parse_dt_config(node, pctldev, &configs,
 		&num_configs);
+	if (err)
+		return err;
+
 	if (num_configs)
 		has_config = 1;
 
@@ -520,21 +523,23 @@  static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 	if (has_config && num_pins >= 1)
 		maps_per_pin++;
 
-	if (!num_pins || !maps_per_pin)
-		return -EINVAL;
+	if (!num_pins || !maps_per_pin) {
+		err = -EINVAL;
+		goto exit;
+	}
 
 	reserve = num_pins * maps_per_pin;
 
 	err = pinctrl_utils_reserve_map(pctldev, map,
 			reserved_maps, num_maps, reserve);
 	if (err < 0)
-		goto fail;
+		goto exit;
 
 	for (i = 0; i < num_pins; i++) {
 		err = of_property_read_u32_index(node, "pinmux",
 				i, &pinfunc);
 		if (err)
-			goto fail;
+			goto exit;
 
 		pin = MTK_GET_PIN_NO(pinfunc);
 		func = MTK_GET_PIN_FUNC(pinfunc);
@@ -543,20 +548,21 @@  static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 				func >= ARRAY_SIZE(mtk_gpio_functions)) {
 			dev_err(pctl->dev, "invalid pins value.\n");
 			err = -EINVAL;
-			goto fail;
+			goto exit;
 		}
 
 		grp = mtk_pctrl_find_group_by_pin(pctl, pin);
 		if (!grp) {
 			dev_err(pctl->dev, "unable to match pin %d to group\n",
 					pin);
-			return -EINVAL;
+			err = -EINVAL;
+			goto exit;
 		}
 
 		err = mtk_pctrl_dt_node_to_map_func(pctl, pin, func, grp, map,
 				reserved_maps, num_maps);
 		if (err < 0)
-			goto fail;
+			goto exit;
 
 		if (has_config) {
 			err = pinctrl_utils_add_map_configs(pctldev, map,
@@ -564,13 +570,14 @@  static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 					configs, num_configs,
 					PIN_MAP_TYPE_CONFIGS_GROUP);
 			if (err < 0)
-				goto fail;
+				goto exit;
 		}
 	}
 
-	return 0;
+	err = 0;
 
-fail:
+exit:
+	kfree(configs);
 	return err;
 }