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Subject[PATCH 4.19 194/234] virtio-mmio: fix missing put_device() when vm_cmdline_parent registration failed
Date
From: chengkaitao <pilgrimtao@gmail.com>

[ Upstream commit a58a7f97ba11391d2d0d408e0b24f38d86ae748e ]

The reference must be released when device_register(&vm_cmdline_parent)
failed. Add the corresponding 'put_device()' in the error handling path.

Signed-off-by: chengkaitao <pilgrimtao@gmail.com>
Message-Id: <20220602005542.16489-1-chengkaitao@didiglobal.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/virtio/virtio_mmio.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index 4cd9ea5c75be..c69c755bf553 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -663,6 +663,7 @@ static int vm_cmdline_set(const char *device,
if (!vm_cmdline_parent_registered) {
err = device_register(&vm_cmdline_parent);
if (err) {
+ put_device(&vm_cmdline_parent);
pr_err("Failed to register parent device!\n");
return err;
}
--
2.35.1


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