From: Akhil P Oommen <quic_akhilpo@quicinc.com>
Date: Wed, 21 Dec 2022 15:09:57 +0000 (+0530)
Subject: drm/msm: Fix failure paths in msm_drm_init()
X-Git-Tag: v6.3-rc1~28^2~13^2~30
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=8636500300a01740d92b345c680b036b94555b1b;p=linux-block.git

drm/msm: Fix failure paths in msm_drm_init()

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

Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/515606/
Link: https://lore.kernel.org/r/20221221203925.v2.2.I49dfc3654040be61702e491f1aa63d3a5f308852@changeid
Signed-off-by: Rob Clark <robdclark@chromium.org>
---

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 c86af9ccb7f4..ff3a1ff423fc 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -150,6 +150,9 @@ 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);
@@ -267,8 +270,6 @@ 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;
 }