Re: [PATCH net-next] net: thunderbolt: Clear finished Tx frame bus address in tbnet_tx_callback()
From: 'Mika Westerberg' <mika.westerberg@linux.intel.com>
Date: 2017-11-20 15:05:19
On Mon, Nov 20, 2017 at 02:46:53PM +0000, David Laight wrote:
quoted
There does not seem to be a way to mark DMA address invalid in a driver so we probably need to add a flag to struct tbnet_frame instead.Can you use the length?
Unfortunately no because size is 12-bit field in struct ring_frame and 0 means 4096 bytes.