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drm/meson: fix unbind path if HDMI fails to bind

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If the case the HDMI controller fails to bind, we try to unbind
all components before calling drm_dev_put() which makes drm_bridge_detach()
crash because unbinding the HDMI controller frees the bridge memory.

The solution is the unbind all components at the end like in the remove
path.

Reviewed-by: Nicolas Belin <nbelin@baylibre.com>
Tested-by: Nicolas Belin <nbelin@baylibre.com>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230512-amlogic-v6-4-upstream-dsi-ccf-vim3-v5-8-56eb7a4d5b8e@linaro.org
This commit is contained in:
Neil Armstrong 2023-05-30 09:38:09 +02:00
parent 25b3b35cd5
commit 6a04464298
1 changed files with 14 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/gpu/drm/meson/meson_drv.c
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@ -316,32 +316,34 @@ static int meson_drv_bind_master(struct device *dev, bool has_components)
goto exit_afbcd;
if (has_components) {
ret = component_bind_all(drm->dev, drm);
ret = component_bind_all(dev, drm);
if (ret) {
dev_err(drm->dev, "Couldn't bind all components\n");
/* Do not try to unbind */
has_components = false;
goto exit_afbcd;
}
}
ret = meson_encoder_hdmi_init(priv);
if (ret)
goto unbind_all;
goto exit_afbcd;
ret = meson_plane_create(priv);
if (ret)
goto unbind_all;
goto exit_afbcd;
ret = meson_overlay_create(priv);
if (ret)
goto unbind_all;
goto exit_afbcd;
ret = meson_crtc_create(priv);
if (ret)
goto unbind_all;
goto exit_afbcd;
ret = request_irq(priv->vsync_irq, meson_irq, 0, drm->driver->name, drm);
if (ret)
goto unbind_all;
goto exit_afbcd;
drm_mode_config_reset(drm);
@ -359,15 +361,18 @@ static int meson_drv_bind_master(struct device *dev, bool has_components)
uninstall_irq:
free_irq(priv->vsync_irq, drm);
unbind_all:
if (has_components)
component_unbind_all(drm->dev, drm);
exit_afbcd:
if (priv->afbcd.ops)
priv->afbcd.ops->exit(priv);
free_drm:
drm_dev_put(drm);
meson_encoder_hdmi_remove(priv);
meson_encoder_cvbs_remove(priv);
if (has_components)
component_unbind_all(dev, drm);
return ret;
}