Hello Felipe > > might be better if you can fix the code, instead. We have a "better" > scatter-gather support in the framework itself. As I understand it, the code was designed to reduce the number of irqs when you expect to send X consecutive packages. In that scenario you only want an irq at the end. ie, u_ether supports it. It was not designed for sg. The problem is that the driver only allocates one sg descriptor per endpoint, without the possibility of chaining the request I dont see how can this can work. And it does not work on my hw. If you could confirm what I am saying about the dma_chaining by testing it on net2280 then I think we should remote the module parameter, because it will only confuse the user and also ofuscates a lot the code. > > UDC needs to set gadget->sg_supported and a pointer to the sg should be > passed in by the gadget driver through usb_request->sg. I could try to implement "pure" sg on net2282.c , but I will only be able to test it on usb338x hardware. If you could test it later I can give it a try. Regards! -- Ricardo Ribalda -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
