linux-kernel - [PATCH] drm/bridge: sn65dsi83: Fix an error handling path in sn65dsi83

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Message-Id: <16e7c6e94a61e6fc2d65db61620955c388798dbb.1640730512.git.christophe.jaillet@wanadoo.fr>
Date:   Tue, 28 Dec 2021 23:37:25 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     andrzej.hajda@...el.com, narmstrong@...libre.com,
        robert.foss@...aro.org, Laurent.pinchart@...asonboard.com,
        jonas@...boo.se, jernej.skrabec@...il.com, airlied@...ux.ie,
        daniel@...ll.ch, marex@...x.de, linus.walleij@...aro.org,
        frieder.schrempf@...tron.de
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] drm/bridge: sn65dsi83: Fix an error handling path in sn65dsi83_probe()

sn65dsi83_parse_dt() takes a reference on 'ctx->host_node' that must be
released in the error handling path 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@...adoo.fr>
---
 drivers/gpu/drm/bridge/ti-sn65dsi83.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
index 945f08de45f1..6edea9f8f8c4 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
@@ -673,8 +673,10 @@ 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 +693,8 @@ 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;
 }
 
-- 
2.32.0