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virtio-mmio: fix missing put_device() when vm_cmdline_parent registration failed

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[ Upstream commit a58a7f97ba ]

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>
This commit is contained in:
chengkaitao 2022-06-02 08:55:42 +08:00 • committed by Greg Kroah-Hartman
commit 6c18f47f47
1 changed files with 1 additions and 0 deletions
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drivers/virtio/virtio_mmio.c
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@ -689,6 +689,7 @@ 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;
}