6ac7cdd715
- Fix a bug in rl_rxeof() handler: in the case where the packet wraps from the end of the receive buffer back to the beginning, we need to insure that at least sizeof(ether_header) bytes make it into the first mbuf. If we don't, then doing eh = mtod(m, struct ether_header *) loses. To avoid this, we use m_pullup() to suck at least MHLEN - RL_ETHER_ALIGN bytes into the first mbuf, which should also help small packets fit into a single mbuf. Pointed out by: Philip A. Prindeville <philipp@zembu.com> - Make the transmit threshold autotuning: start off with a small value and jack it up when TX underruns are detected. - Also improve TX error recovery: kick the chip in the head with a reset/init sequence to make sure it recovers afer a transmit error.
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