[v2,2/4] drm/msm: Fix failure paths in msm_drm_init()

Commit Message

Akhil P Oommen Dec. 21, 2022, 3:09 p.m. UTC

Ensure that we do drm_dev_put() when there is an early return in
msm_drm_init().

Signed-off-by: Akhil P Oommen <[e-mail]>
---

(no changes since v1)

 drivers/gpu/drm/msm/disp/msm_disp_snapshot.c |  3 +++
 drivers/gpu/drm/msm/msm_drv.c                | 11 +++++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c
index e75b97127c0d..b73031cd48e4 100644
--- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c
+++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c
@@ -129,6 +129,9 @@  void msm_disp_snapshot_destroy(struct drm_device *drm_dev)
 	}
 
 	priv = drm_dev->dev_private;
+	if (!priv->kms)
+		return;
+
 	kms = priv->kms;
 
 	if (kms->dump_worker)
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index eb5b056ce3f7..544e041dd710 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -149,6 +149,9 @@  static void msm_irq_uninstall(struct drm_device *dev)
 	struct msm_drm_private *priv = dev->dev_private;
 	struct msm_kms *kms = priv->kms;
 
+	if (!priv->kms)
+		return;
+
 	kms->funcs->irq_uninstall(kms);
 	if (kms->irq_requested)
 		free_irq(kms->irq, dev);
@@ -265,8 +268,6 @@  static int msm_drm_uninit(struct device *dev)
 	component_unbind_all(dev, ddev);
 
 	ddev->dev_private = NULL;
-	drm_dev_put(ddev);
-
 	destroy_workqueue(priv->wq);
 
 	return 0;
@@ -441,12 +442,12 @@  static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
 
 	ret = msm_init_vram(ddev);
 	if (ret)
-		return ret;
+		goto err_drm_dev_put;
 
 	/* Bind all our sub-components: */
 	ret = component_bind_all(dev, ddev);
 	if (ret)
-		return ret;
+		goto err_drm_dev_put;
 
 	dma_set_max_seg_size(dev, UINT_MAX);
 
@@ -541,6 +542,8 @@  static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
 
 err_msm_uninit:
 	msm_drm_uninit(dev);
+err_drm_dev_put:
+	drm_dev_put(ddev);
 	return ret;
 }