drm/msm: fix vram leak on bind errors

Make sure to release the VRAM buffer also in a case a subcomponent fails
to bind.

Fixes: d863f0c7b536 ("drm/msm: Call msm_init_vram before binding the gpu")
Cc: stable@vger.kernel.org      # 5.11
Cc: Craig Tatlor <ctatlor97@gmail.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/525094/
Link: https://lore.kernel.org/r/20230306100722.28485-7-johan+linaro@kernel.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

1 files changed, 19 insertions, 7 deletions

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index ee05ba8cbd8e..4d85ca0ba0c1 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -52,6 +52,8 @@
 #define MSM_VERSION_MINOR	10
 #define MSM_VERSION_PATCHLEVEL	0
 
+static void msm_deinit_vram(struct drm_device *ddev);
+
 static const struct drm_mode_config_funcs mode_config_funcs = {
 	.fb_create = msm_framebuffer_create,
 	.output_poll_changed = drm_fb_helper_output_poll_changed,
@@ -261,12 +263,7 @@ static int msm_drm_uninit(struct device *dev)
 	if (kms && kms->funcs)
 		kms->funcs->destroy(kms);
 
-	if (priv->vram.paddr) {
-		unsigned long attrs = DMA_ATTR_NO_KERNEL_MAPPING;
-		drm_mm_takedown(&priv->vram.mm);
-		dma_free_attrs(dev, priv->vram.size, NULL,
-			       priv->vram.paddr, attrs);
-	}
+	msm_deinit_vram(ddev);
 
 	component_unbind_all(dev, ddev);
 
@@ -404,6 +401,19 @@ static int msm_init_vram(struct drm_device *dev)
 	return ret;
 }
 
+static void msm_deinit_vram(struct drm_device *ddev)
+{
+	struct msm_drm_private *priv = ddev->dev_private;
+	unsigned long attrs = DMA_ATTR_NO_KERNEL_MAPPING;
+
+	if (!priv->vram.paddr)
+		return;
+
+	drm_mm_takedown(&priv->vram.mm);
+	dma_free_attrs(ddev->dev, priv->vram.size, NULL, priv->vram.paddr,
+			attrs);
+}
+
 static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
 {
 	struct msm_drm_private *priv = dev_get_drvdata(dev);
@@ -450,7 +460,7 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
 	/* Bind all our sub-components: */
 	ret = component_bind_all(dev, ddev);
 	if (ret)
-		goto err_put_dev;
+		goto err_deinit_vram;
 
 	dma_set_max_seg_size(dev, UINT_MAX);
 
@@ -548,6 +558,8 @@ err_msm_uninit:
 
 	return ret;
 
+err_deinit_vram:
+	msm_deinit_vram(ddev);
 err_put_dev:
 	drm_dev_put(ddev);