> > Some pointer went dangling around (with address udc_driver), probably!?
>
> It looks like your UDC's probe routine forgot to call
> device_register(&gadget->dev) before passing the gadget structure to usb_add_gadget_udc().
>
> Can you post the source to your probe routine?
>
> Alan Stern
Experience speaks for itself! U R right. But it is not the only trouble this code has.
I can now register the gadget driver (g_zero for example), but could not unregister (it is crashing)!
In other words, modprobe works without problems, rmmod crashes. Here is the max_udc_remove() code:
_______
/**
* max_udc_remove - removes the udc device driver
* @_dev: platform device
*/
static int __exit max_udc_remove(struct platform_device *_dev)
{
struct max_udc *udc = platform_get_drvdata(_dev);
usb_del_gadget_udc(&udc->gadget);
BUG_ON(udc->driver);
udc_disable(udc);
usb_gadget_unregister_driver(udc->driver);
#if CONFIG_MAX_IRQ_SUPPORT
free_irq(udc->irq, udc);
#endif
max_cleanup_debugfs(udc);
if (udc->spibar)
iounmap(udc->spibar);
platform_set_drvdata(_dev, NULL);
dev_info (udc->dev, "unbind\n");
return 0;
}
I dug much deeper (making analogy with net2280 UDC), and I am not sure that what we have for now is entirely correct.
Let me try to think if I need to rewrite some of the things/interfaces...
I very much appreciate your help.
Thank you!
Zoran
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