drm/mediatek: Add missing put_device() call in mtk_drm_kms_init()

if of_find_device_by_node() succeed, mtk_drm_kms_init() doesn't have
a corresponding put_device(). Thus add jump target to fix the exception
handling for this function implementation.

Fixes: 6a252d99de5c ("drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 215f3f7979e0f510f20089e92966cac09be0d8d3..2d982740b1a4c5bde1d2be99c2aa495a5a1d949a 100644 (file)
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -164,7 +164,7 @@ static int mtk_drm_kms_init(struct drm_device *drm)
 
        ret = drmm_mode_config_init(drm);
        if (ret)
-               return ret;
+               goto put_mutex_dev;
 
        drm->mode_config.min_width = 64;
        drm->mode_config.min_height = 64;
@@ -181,7 +181,7 @@ static int mtk_drm_kms_init(struct drm_device *drm)
 
        ret = component_bind_all(drm->dev, drm);
        if (ret)
-               return ret;
+               goto put_mutex_dev;
 
        /*
         * We currently support two fixed data streams, each optional,
@@ -228,7 +228,7 @@ static int mtk_drm_kms_init(struct drm_device *drm)
        }
        if (!dma_dev->dma_parms) {
                ret = -ENOMEM;
-               goto err_component_unbind;
+               goto put_dma_dev;
        }
 
        ret = dma_set_max_seg_size(dma_dev, (unsigned int)DMA_BIT_MASK(32));
@@ -255,9 +255,12 @@ static int mtk_drm_kms_init(struct drm_device *drm)
 err_unset_dma_parms:
        if (private->dma_parms_allocated)
                dma_dev->dma_parms = NULL;
+put_dma_dev:
+       put_device(private->dma_dev);
 err_component_unbind:
        component_unbind_all(drm->dev, drm);
-
+put_mutex_dev:
+       put_device(private->mutex_dev);
        return ret;
 }