Re: MOD_INC_USE_COUNT

[Tony]

Ralf Baechle wrote:
> On Thu, Nov 10, 2005 at 10:21:26PM +0800, Tony wrote:
>
>
> > But when the module is used by a net_device(interface is up), rmmod also 
> > works. Strange, isn't it?
>
>
> Not strange at all.  The typical network driver is implemented using
> pci_register_driver which will set the owner filed of the driver's struct
> driver which then is being used for internal reference counting.  Other
> busses or line disciplines (SLIP, PPP, AX.25 ...) need to do the equivalent
> or the kernel will believe reference counting isn't necessary and it's
> ok to unload the module at any time.
>
> In which driver did you hit this problem?
>
>   Ralf
I have a radio connected to host using ethernet. I'm writing a radio 
driver that masquerade radio as a NIC. when the module is loaded, I just 
register_netdev a net_device struct, while unregister_netdev at module 
cleanup.

Tony
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/