[v3,3/3] media: platform: mtk-mdp3: fix error handling in mdp_probe()

Commit Message

Moudy Ho (何宗原) Oct. 20, 2022, 7:18 a.m. UTC

Adjust label "err_return" order to avoid double freeing, and
add two labels for easy traceability.

Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
Signed-off-by: Moudy Ho <[e-mail]>
---
 .../media/platform/mediatek/mdp3/mtk-mdp3-core.c  | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

Comments

AngeloGioacchino Del Regno Oct. 21, 2022, 8:47 a.m. UTC | #1

Il 20/10/22 09:18, Moudy Ho ha scritto:
> Adjust label "err_return" order to avoid double freeing, and
> add two labels for easy traceability.
> 
> Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
> Signed-off-by: Moudy Ho <[e-mail]>

Reviewed-by: AngeloGioacchino Del Regno <[e-mail]>

Patch

diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
index c413e59d4286..2d1f6ae9f080 100644
--- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
+++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
@@ -196,27 +196,27 @@  static int mdp_probe(struct platform_device *pdev)
 	mm_pdev = __get_pdev_by_id(pdev, MDP_INFRA_MMSYS);
 	if (!mm_pdev) {
 		ret = -ENODEV;
-		goto err_return;
+		goto err_destroy_device;
 	}
 	mdp->mdp_mmsys = &mm_pdev->dev;
 
 	mm_pdev = __get_pdev_by_id(pdev, MDP_INFRA_MUTEX);
 	if (WARN_ON(!mm_pdev)) {
 		ret = -ENODEV;
-		goto err_return;
+		goto err_destroy_device;
 	}
 	for (i = 0; i < MDP_PIPE_MAX; i++) {
 		mdp->mdp_mutex[i] = mtk_mutex_get(&mm_pdev->dev);
 		if (!mdp->mdp_mutex[i]) {
 			ret = -ENODEV;
-			goto err_return;
+			goto err_free_mutex;
 		}
 	}
 
 	ret = mdp_comp_config(mdp);
 	if (ret) {
 		dev_err(dev, "Failed to config mdp components\n");
-		goto err_return;
+		goto err_free_mutex;
 	}
 
 	mdp->job_wq = alloc_workqueue(MDP_MODULE_NAME, WQ_FREEZABLE, 0);
@@ -287,11 +287,12 @@  static int mdp_probe(struct platform_device *pdev)
 	destroy_workqueue(mdp->job_wq);
 err_deinit_comp:
 	mdp_comp_destroy(mdp);
-err_return:
+err_free_mutex:
 	for (i = 0; i < MDP_PIPE_MAX; i++)
-		if (mdp)
-			mtk_mutex_put(mdp->mdp_mutex[i]);
+		mtk_mutex_put(mdp->mdp_mutex[i]);
+err_destroy_device:
 	kfree(mdp);
+err_return:
 	dev_dbg(dev, "Errno %d\n", ret);
 	return ret;
 }