On Wed, 21 Sep 2005, Andy Chuo wrote:
> Hi Alan,
>
> Thanks for the info. So far, I can't change the kernel to 2.6, any chance
> for this to happen on 2.4.21? Inside my init() section I basically did three
> things:
> 1. request_mem_region()
> 2. initialize driver data.
> 3. request irq.
>
> The following is the reply from Dave:
> >Then clearly you've not written the probe() or remove() methods in your
> peripheral >controller driver correctly ...
> >- Dave
>
> >And my reply:
> >Are the Probe() and the remove() methods applicable on non-PCI based UDC? I
> >basically followed the pxa25x UDC controller driver structure because the
> UDC I am >working on is part of the ARM SOC core not a PCI device. I only
> see the probe() and >remove() methods under the goku and net2280
> implementations and they are both >PCI based. Am I making sense here?
In 2.6, probe and remove methods apply to all drivers, PCI-based or not.
In 2.4 the situation is different.
2.4.21 should work. It may be that your exit() routine doesn't undo
everything the init() routine sets up. Like I said before, put printk
statements in your driver so you can see what is happening. Also look at
/proc/interrupts and /proc/io{mem,ports}, or the 2.4 equivalent, before
insmod, after insmod, and after rmmod to make sure that all the resources
you claim do eventually get released.
I notice that the pxa2xx_udc driver in 2.4 declares the cleanup() routine
as __init. That's probably a mistake.
Alan Stern
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