David Miller [mailto:davem@xxxxxxxxxxxxx] > Sent: Wednesday, November 12, 2014 1:44 PM [...] > What do other USB network drivers do in similar situations? According to the usbnet.c, it would make sure to submit the number of min(10, RX_QLEN(dev)) rx buffers. If there are not enough rx buffers, it schedule a tasklet for next try. The brief flow is as following. 1. Call open(). - schedule a tasklet. 2. Tasklet is called. if (dev->rxq.qlen < RX_QLEN(dev)) { - submit rx buffers util the number of min(10, RX_QLEN(dev)). If the error occurs, break the loop. - If the dev->rxq.qlen < RX_QLEN(dev), schedule the tasklet. } Best Regards, Hayes -- 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
