Hi all, we use a USB gadget driver on a MPC8247 based board. We use the connection for serial emulation. Currently we are using kernel version 2.6.33. Our HW driver is the file drivers/usb/gadget/fsl_qe_udc.c and the layer above the drivers/usb/gadget/u_serial.c file. Now I see that we have a problem if we send from our board to the host messages which have a payload size of n*64Bytes. If I send 63 Bytes I got one fsl_qe_udc irq and everything works fine. If I send 65 Bytes I get two fsl_qe_udc irq and everything works fine. But if I send 64 Bytes I get one interrupt but my USB tracing tool on the host side did not catch the packet send upwards. If I afterwards send a packet with a different size e.g. 63Bytes I catch at the previous send 64Byte packet and the newly send 63Byte packet. Same problem occurs if I choose packets with n*64Byte. So there seems to be a problem if I send packets on 64byte borders. Currently I debug the driver but I do not find the point where it is going wrong. Maybe someone has a hint where the problem might be. Any help is appreciated. Best regards Holger Brunck -- 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
