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

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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>
(cherry picked from commit a58a7f97ba)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I6ccf7cba3458dd3402ce0bb39d2b110a599ad7ee
This commit is contained in:
chengkaitao 2022-06-02 08:55:42 +08:00 committed by Treehugger Robot
parent 5571a91668
commit 2e977b72c0
1 changed files with 1 additions and 0 deletions
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drivers/virtio/virtio_mmio.c
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@ -701,6 +701,7 @@ 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;
}