[RFC PATCH 22/27] net/intel: mark mid-burst ring cleanup as unlikely

[Bruce Richardson]

It should rarely be the case that we need to cleanup the descriptor ring
mid-burst, so mark as unlikely to help performance.

Signed-off-by: Bruce Richardson <bruce.richard...@intel.com>
---
 drivers/net/intel/common/tx_scalar_fns.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/intel/common/tx_scalar_fns.h 
b/drivers/net/intel/common/tx_scalar_fns.h
index cb45029bd7..27791cf138 100644
--- a/drivers/net/intel/common/tx_scalar_fns.h
+++ b/drivers/net/intel/common/tx_scalar_fns.h
@@ -272,7 +272,7 @@ ci_xmit_pkts(struct ci_tx_queue *txq,
                if (tx_last >= txq->nb_tx_desc)
                        tx_last = (uint16_t)(tx_last - txq->nb_tx_desc);
 
-               if (nb_used > txq->nb_tx_free) {
+               if (unlikely(nb_used > txq->nb_tx_free)) {
                        if (ci_tx_xmit_cleanup(txq) != 0) {
                                if (nb_tx == 0)
                                        return 0;
-- 
2.51.0