rpmsg: char: Fix race between the release of rpmsg_eptdev and cdev

[mirror_ubuntu-jammy-kernel.git] / drivers / rpmsg / rpmsg_char.c

diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
index ba85f5d11960a45dc374eea087051d3d908e12b6..49dd5a2009982897479bd7479ba1f0f153dd2c2a 100644 (file)
--- a/drivers/rpmsg/rpmsg_char.c
+++ b/drivers/rpmsg/rpmsg_char.c
@@ -92,7 +92,7 @@ static int rpmsg_eptdev_destroy(struct device *dev, void *data)
        /* wake up any blocked readers */
        wake_up_interruptible(&eptdev->readq);
 
-       device_del(&eptdev->dev);
+       cdev_device_del(&eptdev->cdev, &eptdev->dev);
        put_device(&eptdev->dev);
 
        return 0;
@@ -335,7 +335,6 @@ static void rpmsg_eptdev_release_device(struct device *dev)
 
        ida_simple_remove(&rpmsg_ept_ida, dev->id);
        ida_simple_remove(&rpmsg_minor_ida, MINOR(eptdev->dev.devt));
-       cdev_del(&eptdev->cdev);
        kfree(eptdev);
 }
 
@@ -380,19 +379,13 @@ static int rpmsg_eptdev_create(struct rpmsg_ctrldev *ctrldev,
        dev->id = ret;
        dev_set_name(dev, "rpmsg%d", ret);
 
-       ret = cdev_add(&eptdev->cdev, dev->devt, 1);
+       ret = cdev_device_add(&eptdev->cdev, &eptdev->dev);
        if (ret)
                goto free_ept_ida;
 
        /* We can now rely on the release function for cleanup */
        dev->release = rpmsg_eptdev_release_device;
 
-       ret = device_add(dev);
-       if (ret) {
-               dev_err(dev, "device_add failed: %d\n", ret);
-               put_device(dev);
-       }
-
        return ret;
 
 free_ept_ida: