This patch addresses two distinct races:
- Until now, the driver started the chip for Tx regardless of errors
pending in the status register. Not good if an error occured while
we were queueing packets -- the chip counter had not been reset,
so Tx died. (We can't reliably get an interrupt for every error
condition)
- The Rhine-II (when under load) frequently produces a Tx descriptor
write-back race error. Failing to handle this means waiting for the
netdev watchdog. Fixed.
In addition, we must wait for the Tx engine to turn off on error
conditions before we scavenge the descriptor entries. Failing to do
so will typically lead to performance going down to about 10%: Burst,
timeout, burst, timeout.. (again, with a Rhine-II under load).
This archive was generated by hypermail 2b29 : Fri Feb 28 2003 - 22:00:41 EST