On Tue, Jul 18, 2023 at 09:57:06AM +0200, Markus Schneider-Pargmann wrote: > The network queue is currently always stopped in start_xmit and > continued in the interrupt handler. This is not possible anymore if we > want to keep multiple transmits in flight in parallel. > > Use the previously introduced tx_fifo_in_flight counter to control the > network queue instead. This has the benefit of not needing to ask the > hardware about fifo status. > > This patch stops the network queue in start_xmit if the number of > transmits in flight reaches the size of the fifo and wakes up the queue > from the interrupt handler once the transmits in flight drops below the > fifo size. This means any skbs over the limit will be rejected > immediately in start_xmit (it shouldn't be possible at all to reach that > state anyways). > > The maximum number of transmits in flight is the size of the fifo. > > Signed-off-by: Markus Schneider-Pargmann <msp@xxxxxxxxxxxx> Reviewed-by: Simon Horman <simon.horman@xxxxxxxxxxxx>
