On Tue, 12 Feb 2008, Jean-Christophe Dubois wrote: > Let's ask the question: if usbcore was detecting an endpoint with a 0 > dev->maxpacket would it reject it right away or would it pass it anyway > trusting that the specific driver would know about this problem (buggy > hardware is everywhere) and work around it in software.
As far as I know, there's nothing illegal about an Interrupt or Isochronous endpoint having maxpacket size 0. It might even be useful, for example, in Boolean polling. Bulk and control endpoints are different; the spec limits their possible maxpacket sizes to only a few power-of-2 values. I don't see how a bulk endpoint with 0 maxpacket could be useful for anything. At any rate, until Dave posted his patch usbcore did not check for illegal maxpacket values (other than on ep0). Alan Stern - To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
