From b78a6aa3876bdd0aa819eb1738caa6d74867b94e Mon Sep 17 00:00:00 2001 From: Zhu Yanjun Date: Tue, 28 Nov 2017 01:42:22 -0500 Subject: [PATCH] forcedeth: optimize the xmit with unlikely In xmit, it is very impossible that TX_ERROR occurs. So using unlikely optimizes the xmit process. CC: Srinivas Eeda CC: Joe Jin CC: Junxiao Bi Signed-off-by: Zhu Yanjun Signed-off-by: David S. Miller --- drivers/net/ethernet/nvidia/forcedeth.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c index 481876b5424c..53614ed694fc 100644 --- a/drivers/net/ethernet/nvidia/forcedeth.c +++ b/drivers/net/ethernet/nvidia/forcedeth.c @@ -2563,7 +2563,7 @@ static int nv_tx_done(struct net_device *dev, int limit) if (np->desc_ver == DESC_VER_1) { if (flags & NV_TX_LASTPACKET) { - if (flags & NV_TX_ERROR) { + if (unlikely(flags & NV_TX_ERROR)) { if ((flags & NV_TX_RETRYERROR) && !(flags & NV_TX_RETRYCOUNT_MASK)) nv_legacybackoff_reseed(dev); @@ -2580,7 +2580,7 @@ static int nv_tx_done(struct net_device *dev, int limit) } } else { if (flags & NV_TX2_LASTPACKET) { - if (flags & NV_TX2_ERROR) { + if (unlikely(flags & NV_TX2_ERROR)) { if ((flags & NV_TX2_RETRYERROR) && !(flags & NV_TX2_RETRYCOUNT_MASK)) nv_legacybackoff_reseed(dev); @@ -2626,7 +2626,7 @@ static int nv_tx_done_optimized(struct net_device *dev, int limit) nv_unmap_txskb(np, np->get_tx_ctx); if (flags & NV_TX2_LASTPACKET) { - if (flags & NV_TX2_ERROR) { + if (unlikely(flags & NV_TX2_ERROR)) { if ((flags & NV_TX2_RETRYERROR) && !(flags & NV_TX2_RETRYCOUNT_MASK)) { if (np->driver_data & DEV_HAS_GEAR_MODE) -- 2.30.2