Re: BUG: 'Unknown symbol in module' happens after reloading ehci-hcd module

From: Ming Lei
Date: Wed Jul 28 2010 - 03:33:36 EST

2010/7/28 Ming Lei <tom.leiming@xxxxxxxxx>:
> Hi,
> 'Unknown symbol in module'  happens after the actions below:
>         rmmod ehci-hcd
>         modprobe ehci-hcd

The issue is caused by returning failure of debugfs_create_dir, and
which may be fixed by replacing debugfs_remove with
debugfs_remove_recursive in ehci_hcd_cleanup.

Why does insmod show 'Unknown symbol in module' when module .init
return -ENOENT? The message does make us confused.

Lei Ming
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