diff options
| author | AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> | 2025-02-17 16:48:10 +0100 |
|---|---|---|
| committer | Chun-Kuang Hu <chunkuang.hu@kernel.org> | 2025-02-19 13:56:16 +0000 |
| commit | 0be123cafc06eed0fd1227166a66e786434b0c50 (patch) | |
| tree | ddfed9eba260cf6f681d24f380faf8026d1539bc | |
| parent | 2014c95afecee3e76ca4a56956a936e23283f05b (diff) | |
drm/mediatek: mtk_hdmi: Unregister audio platform device on failure
The probe function of this driver may fail after registering the
audio platform device: in that case, the state is not getting
cleaned up, leaving this device registered.
Adding up to the mix, should the probe function of this driver
return a probe deferral for N times, we're registering up to N
audio platform devices and, again, never freeing them up.
To fix this, add a pointer to the audio platform device in the
mtk_hdmi structure, and add a devm action to unregister it upon
driver removal or probe failure.
Fixes: 8f83f26891e1 ("drm/mediatek: Add HDMI support")
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20250217154836.108895-18-angelogioacchino.delregno@collabora.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
| -rw-r--r-- | drivers/gpu/drm/mediatek/mtk_hdmi.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c index ca82bc829cb9..1018a9a7433f 100644 --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c @@ -173,6 +173,7 @@ struct mtk_hdmi { unsigned int sys_offset; void __iomem *regs; enum hdmi_colorspace csp; + struct platform_device *audio_pdev; struct hdmi_audio_param aud_param; bool audio_enable; bool powered; @@ -1662,6 +1663,11 @@ static const struct hdmi_codec_ops mtk_hdmi_audio_codec_ops = { .hook_plugged_cb = mtk_hdmi_audio_hook_plugged_cb, }; +static void mtk_hdmi_unregister_audio_driver(void *data) +{ + platform_device_unregister(data); +} + static int mtk_hdmi_register_audio_driver(struct device *dev) { struct mtk_hdmi *hdmi = dev_get_drvdata(dev); @@ -1672,13 +1678,20 @@ static int mtk_hdmi_register_audio_driver(struct device *dev) .data = hdmi, .no_capture_mute = 1, }; - struct platform_device *pdev; + int ret; - pdev = platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, - PLATFORM_DEVID_AUTO, &codec_data, - sizeof(codec_data)); - if (IS_ERR(pdev)) - return PTR_ERR(pdev); + hdmi->audio_pdev = platform_device_register_data(dev, + HDMI_CODEC_DRV_NAME, + PLATFORM_DEVID_AUTO, + &codec_data, + sizeof(codec_data)); + if (IS_ERR(hdmi->audio_pdev)) + return PTR_ERR(hdmi->audio_pdev); + + ret = devm_add_action_or_reset(dev, mtk_hdmi_unregister_audio_driver, + hdmi->audio_pdev); + if (ret) + return ret; DRM_INFO("%s driver bound to HDMI\n", HDMI_CODEC_DRV_NAME); return 0; |