On Mon, 4 Jul 2016, Tomáš Vávra wrote: > Sometime it fails when sending only 1024 B, or similar sized number, > usually 512 B is lost. I also tried to analyze USB packets with > Wireshark and there really was missing packets. But nothing else I could > interpret as a anomaly. Just maybe one thing bothers me, why is usbmon > capturing bulk endpoint packets which are bigger than 512 B? For example > I can mostly see bulk packets with size of 1024. I can attach an usbmon > output when it fails, but it will be much larger.
I can't answer most of your questions, but I can answer the question about usbmon. usbmon does not capture packets -- it captures URBs. A single URB can correspond to multiple packets. A bulk URB with size 1024 is perfectly legal; it will correspond to two 512-byte packets. 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
