linux-kernel - [PATCH 2/2] drm/meson: Fix error handling when afbcd.ops->init fails

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Message-Id: <20211230235515.1627522-3-martin.blumenstingl@googlemail.com>
Date:   Fri, 31 Dec 2021 00:55:15 +0100
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     linux-amlogic@...ts.infradead.org
Cc:     dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        narmstrong@...libre.com,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH 2/2] drm/meson: Fix error handling when afbcd.ops->init fails

When afbcd.ops->init fails we need to free the struct drm_device. Also
all errors which come after afbcd.ops->init was successful need to exit
the AFBCD, just like meson_drv_unbind() does.

Fixes: d1b5e41e13a7e9 ("drm/meson: Add AFBCD module driver")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
---
 drivers/gpu/drm/meson/meson_drv.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c
index b919271a6e50..26aeaf0ab86e 100644
--- a/drivers/gpu/drm/meson/meson_drv.c
+++ b/drivers/gpu/drm/meson/meson_drv.c
@@ -302,42 +302,42 @@ static int meson_drv_bind_master(struct device *dev, bool has_components)
 	if (priv->afbcd.ops) {
 		ret = priv->afbcd.ops->init(priv);
 		if (ret)
-			return ret;
+			goto free_drm;
 	}
 
 	/* Encoder Initialization */
 
 	ret = meson_encoder_cvbs_init(priv);
 	if (ret)
-		goto free_drm;
+		goto exit_afbcd;
 
 	if (has_components) {
 		ret = component_bind_all(drm->dev, drm);
 		if (ret) {
 			dev_err(drm->dev, "Couldn't bind all components\n");
-			goto free_drm;
+			goto exit_afbcd;
 		}
 	}
 
 	ret = meson_encoder_hdmi_init(priv);
 	if (ret)
-		goto free_drm;
+		goto exit_afbcd;
 
 	ret = meson_plane_create(priv);
 	if (ret)
-		goto free_drm;
+		goto exit_afbcd;
 
 	ret = meson_overlay_create(priv);
 	if (ret)
-		goto free_drm;
+		goto exit_afbcd;
 
 	ret = meson_crtc_create(priv);
 	if (ret)
-		goto free_drm;
+		goto exit_afbcd;
 
 	ret = request_irq(priv->vsync_irq, meson_irq, 0, drm->driver->name, drm);
 	if (ret)
-		goto free_drm;
+		goto exit_afbcd;
 
 	drm_mode_config_reset(drm);
 
@@ -355,6 +355,9 @@ static int meson_drv_bind_master(struct device *dev, bool has_components)
 
 uninstall_irq:
 	free_irq(priv->vsync_irq, drm);
+exit_afbcd:
+	if (priv->afbcd.ops)
+		priv->afbcd.ops->exit(priv);
 free_drm:
 	drm_dev_put(drm);
 
-- 
2.34.1