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virtio: console: fix error handling in init() function

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If register_virtio_driver() fails, virtio-ports class is not destroyed.
The patch adds error handling of register_virtio_driver().

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Acked-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Alexey Khoroshilov 2012-09-01 23:49:37 +04:00 committed by Rusty Russell
parent 5b8fa822b7
commit 33e1afc3d8
1 changed files with 11 additions and 1 deletions
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12
drivers/char/virtio_console.c
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@ -2099,7 +2099,17 @@ static int __init init(void)
INIT_LIST_HEAD(&pdrvdata.consoles);
INIT_LIST_HEAD(&pdrvdata.portdevs);
return register_virtio_driver(&virtio_console);
err = register_virtio_driver(&virtio_console);
if (err < 0) {
pr_err("Error %d registering virtio driver\n", err);
goto free;
}
return 0;
free:
if (pdrvdata.debugfs_dir)
debugfs_remove_recursive(pdrvdata.debugfs_dir);
class_destroy(pdrvdata.class);
return err;
}
static void __exit fini(void)