[PATCH v2] rpmsg: Avoid double-free in mtk_rpmsg_register_device

[Nicolas Boichat]

If rpmsg_register_device fails, it will call
mtk_rpmsg_release_device which already frees mdev.

Fixes: 7017996951fde84 ("rpmsg: add rpmsg support for mt8183 SCP.")
Signed-off-by: Nicolas Boichat <drink...@chromium.org>
---

Changes in v2:
 - Drop useless if and ret variable (Markus Elfring)

 drivers/rpmsg/mtk_rpmsg.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/rpmsg/mtk_rpmsg.c b/drivers/rpmsg/mtk_rpmsg.c
index 83f2b8804ee989d..96a17ec2914011d 100644
--- a/drivers/rpmsg/mtk_rpmsg.c
+++ b/drivers/rpmsg/mtk_rpmsg.c
@@ -200,7 +200,6 @@ static int mtk_rpmsg_register_device(struct 
mtk_rpmsg_rproc_subdev *mtk_subdev,
        struct rpmsg_device *rpdev;
        struct mtk_rpmsg_device *mdev;
        struct platform_device *pdev = mtk_subdev->pdev;
-       int ret;
 
        mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
        if (!mdev)
@@ -219,13 +218,7 @@ static int mtk_rpmsg_register_device(struct 
mtk_rpmsg_rproc_subdev *mtk_subdev,
        rpdev->dev.parent = &pdev->dev;
        rpdev->dev.release = mtk_rpmsg_release_device;
 
-       ret = rpmsg_register_device(rpdev);
-       if (ret) {
-               kfree(mdev);
-               return ret;
-       }
-
-       return 0;
+       return rpmsg_register_device(rpdev);
 }
 
 static void mtk_register_device_work_function(struct work_struct 
*register_work)
-- 
2.28.0.402.g5ffc5be6b7-goog