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0d1ddfe42c
We cancel any pending transmissions when (re)starting the device since any transmissions that were initiated before the admin queue reset will not complete. The network device core will also cancel any pending transmissions after the device is closed. If the device is closed with some transmissions still pending and is then reopened, this will therefore result in a stale I/O buffer being passed to netdev_tx_complete_err() when the device is restarted. This error has not been observed in practice since transmissions generally complete almost immediately and it is therefore unlikely that the device will ever be closed with transmissions still pending. With out-of-order queues, the device seems to delay transmit completions (with no upper time limit) until a complete batch is available to be written out as a block of 128 bytes. It is therefore very likely that the device will be closed with transmissions still pending. Fix by ensuring that we have dropped all references to transmit I/O buffers before returning from gve_close(). Signed-off-by: Michael Brown <mcb30@ipxe.org>
iPXE README File Quick start guide: cd src make For any more detailed instructions, see http://ipxe.org