diff mbox series

[v2] drm/bridge: sn65dsi83: Fix an error handling path in sn65dsi83_probe()

Message ID 4bc21aed4b60d3d5ac4b28d8b07a6fdd8da6a536.1640768126.git.christophe.jaillet@wanadoo.fr (mailing list archive)
State New, archived
Headers show
Series [v2] drm/bridge: sn65dsi83: Fix an error handling path in sn65dsi83_probe() | expand

Commit Message

Christophe JAILLET Dec. 29, 2021, 8:58 a.m. UTC
sn65dsi83_parse_dt() takes a reference on 'ctx->host_node' that must be
released in the error handling path of this function and of the probe.
This is only done in the remove function up to now.

Fixes: ceb515ba29ba ("drm/bridge: ti-sn65dsi83: Add TI SN65DSI83 and SN65DSI84 driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
v2: add error handling in sn65dsi83_parse_dt() [Laurent Pinchart]
---
 drivers/gpu/drm/bridge/ti-sn65dsi83.c | 32 +++++++++++++++++++--------
 1 file changed, 23 insertions(+), 9 deletions(-)

Comments

Laurent Pinchart Dec. 29, 2021, 4:10 p.m. UTC | #1
Hi Christophe,

Thank you for the patch.

On Wed, Dec 29, 2021 at 09:58:44AM +0100, Christophe JAILLET wrote:
> sn65dsi83_parse_dt() takes a reference on 'ctx->host_node' that must be
> released in the error handling path of this function and of the probe.
> This is only done in the remove function up to now.
> 
> Fixes: ceb515ba29ba ("drm/bridge: ti-sn65dsi83: Add TI SN65DSI83 and SN65DSI84 driver")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
> v2: add error handling in sn65dsi83_parse_dt() [Laurent Pinchart]
> ---
>  drivers/gpu/drm/bridge/ti-sn65dsi83.c | 32 +++++++++++++++++++--------
>  1 file changed, 23 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
> index 945f08de45f1..314a84ffcea3 100644
> --- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c
> +++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
> @@ -560,10 +560,14 @@ static int sn65dsi83_parse_dt(struct sn65dsi83 *ctx, enum sn65dsi83_model model)
>  	ctx->host_node = of_graph_get_remote_port_parent(endpoint);
>  	of_node_put(endpoint);
>  
> -	if (ctx->dsi_lanes < 0 || ctx->dsi_lanes > 4)
> -		return -EINVAL;
> -	if (!ctx->host_node)
> -		return -ENODEV;
> +	if (ctx->dsi_lanes < 0 || ctx->dsi_lanes > 4) {
> +		ret = -EINVAL;
> +		goto err_put_node;
> +	}
> +	if (!ctx->host_node) {
> +		ret = -ENODEV;
> +		goto err_put_node;
> +	}
>  
>  	ctx->lvds_dual_link = false;
>  	ctx->lvds_dual_link_even_odd_swap = false;
> @@ -590,16 +594,22 @@ static int sn65dsi83_parse_dt(struct sn65dsi83 *ctx, enum sn65dsi83_model model)
>  
>  	ret = drm_of_find_panel_or_bridge(dev->of_node, 2, 0, &panel, &panel_bridge);
>  	if (ret < 0)
> -		return ret;
> +		goto err_put_node;
>  	if (panel) {
>  		panel_bridge = devm_drm_panel_bridge_add(dev, panel);
> -		if (IS_ERR(panel_bridge))
> -			return PTR_ERR(panel_bridge);
> +		if (IS_ERR(panel_bridge)) {
> +			ret = PTR_ERR(panel_bridge);
> +			goto err_put_node;
> +		}
>  	}
>  
>  	ctx->panel_bridge = panel_bridge;
>  
>  	return 0;
> +
> +err_put_node:
> +	of_node_put(ctx->host_node);
> +	return ret;
>  }
>  
>  static int sn65dsi83_host_attach(struct sn65dsi83 *ctx)
> @@ -673,8 +683,10 @@ static int sn65dsi83_probe(struct i2c_client *client,
>  		return ret;
>  
>  	ctx->regmap = devm_regmap_init_i2c(client, &sn65dsi83_regmap_config);
> -	if (IS_ERR(ctx->regmap))
> -		return PTR_ERR(ctx->regmap);
> +	if (IS_ERR(ctx->regmap)) {
> +		ret = PTR_ERR(ctx->regmap);
> +		goto err_put_node;
> +	}
>  
>  	dev_set_drvdata(dev, ctx);
>  	i2c_set_clientdata(client, ctx);
> @@ -691,6 +703,8 @@ static int sn65dsi83_probe(struct i2c_client *client,
>  
>  err_remove_bridge:
>  	drm_bridge_remove(&ctx->bridge);
> +err_put_node:
> +	of_node_put(ctx->host_node);
>  	return ret;
>  }
>
Robert Foss Jan. 3, 2022, 10:30 a.m. UTC | #2
Applied to drm-misc-next
diff mbox series

Patch

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
index 945f08de45f1..314a84ffcea3 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
@@ -560,10 +560,14 @@  static int sn65dsi83_parse_dt(struct sn65dsi83 *ctx, enum sn65dsi83_model model)
 	ctx->host_node = of_graph_get_remote_port_parent(endpoint);
 	of_node_put(endpoint);
 
-	if (ctx->dsi_lanes < 0 || ctx->dsi_lanes > 4)
-		return -EINVAL;
-	if (!ctx->host_node)
-		return -ENODEV;
+	if (ctx->dsi_lanes < 0 || ctx->dsi_lanes > 4) {
+		ret = -EINVAL;
+		goto err_put_node;
+	}
+	if (!ctx->host_node) {
+		ret = -ENODEV;
+		goto err_put_node;
+	}
 
 	ctx->lvds_dual_link = false;
 	ctx->lvds_dual_link_even_odd_swap = false;
@@ -590,16 +594,22 @@  static int sn65dsi83_parse_dt(struct sn65dsi83 *ctx, enum sn65dsi83_model model)
 
 	ret = drm_of_find_panel_or_bridge(dev->of_node, 2, 0, &panel, &panel_bridge);
 	if (ret < 0)
-		return ret;
+		goto err_put_node;
 	if (panel) {
 		panel_bridge = devm_drm_panel_bridge_add(dev, panel);
-		if (IS_ERR(panel_bridge))
-			return PTR_ERR(panel_bridge);
+		if (IS_ERR(panel_bridge)) {
+			ret = PTR_ERR(panel_bridge);
+			goto err_put_node;
+		}
 	}
 
 	ctx->panel_bridge = panel_bridge;
 
 	return 0;
+
+err_put_node:
+	of_node_put(ctx->host_node);
+	return ret;
 }
 
 static int sn65dsi83_host_attach(struct sn65dsi83 *ctx)
@@ -673,8 +683,10 @@  static int sn65dsi83_probe(struct i2c_client *client,
 		return ret;
 
 	ctx->regmap = devm_regmap_init_i2c(client, &sn65dsi83_regmap_config);
-	if (IS_ERR(ctx->regmap))
-		return PTR_ERR(ctx->regmap);
+	if (IS_ERR(ctx->regmap)) {
+		ret = PTR_ERR(ctx->regmap);
+		goto err_put_node;
+	}
 
 	dev_set_drvdata(dev, ctx);
 	i2c_set_clientdata(client, ctx);
@@ -691,6 +703,8 @@  static int sn65dsi83_probe(struct i2c_client *client,
 
 err_remove_bridge:
 	drm_bridge_remove(&ctx->bridge);
+err_put_node:
+	of_node_put(ctx->host_node);
 	return ret;
 }