um: virtio: free vu_dev only with the contained struct device

[ Upstream commit f4172b084342fd3f9e38c10650ffe19eac30d8ce ]

Since struct device is refcounted, we shouldn't free the vu_dev
immediately when it's removed from the platform device, but only
when the references actually all go away. Move the freeing to
the release to accomplish that.

Fixes: 5d38f324993f ("um: drivers: Add virtio vhost-user driver")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c
index a6c4bb6..c17b8e5 100644 (file)
--- a/arch/um/drivers/virtio_uml.c
+++ b/arch/um/drivers/virtio_uml.c
@@ -1083,6 +1083,7 @@ static void virtio_uml_release_dev(struct device *d)
        }
 
        os_close_file(vu_dev->sock);
+       kfree(vu_dev);
 }
 
 /* Platform device */
@@ -1096,7 +1097,7 @@ static int virtio_uml_probe(struct platform_device *pdev)
        if (!pdata)
                return -EINVAL;
 
-       vu_dev = devm_kzalloc(&pdev->dev, sizeof(*vu_dev), GFP_KERNEL);
+       vu_dev = kzalloc(sizeof(*vu_dev), GFP_KERNEL);
        if (!vu_dev)
                return -ENOMEM;