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ppdev: ppdev_init: do not return zero in case of failure 

Error handling of parport_register_driver() in ppdev_init()
is broken because it deallocates all resources but still
returns zero.

Currently parport_register_driver() always succeeds.
Nevertheless it is worth to fix the issue.

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

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexey Khoroshilov 2012-09-02 00:31:58 +04:00 committed by Greg Kroah-Hartman
parent 0bf5a8be47
commit 9a32bb39d6
1 changed files with 2 additions and 1 deletions
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3
drivers/char/ppdev.c
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@ -783,7 +783,8 @@ static int __init ppdev_init (void)
err = PTR_ERR(ppdev_class);
goto out_chrdev;
}
if (parport_register_driver(&pp_driver)) {
err = parport_register_driver(&pp_driver);
if (err < 0) {
printk (KERN_WARNING CHRDEV ": unable to register with parport\n");
goto out_class;
}