netdev - [PATCH] net: ethernet: ti: cpts: break cycle once late ts is matched

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Date:   Tue, 10 Jul 2018 16:04:04 +0300
From:   Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
To:     davem@...emloft.net, grygorii.strashko@...com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
Subject: [PATCH] net: ethernet: ti: cpts: break cycle once late ts is matched

The late ts queue can contain a bunch of skbs while hi rate testing,
no need to check all of them if timestamp is already matched.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
---

Based on net-next/master

 drivers/net/ethernet/ti/cpts.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ti/cpts.c b/drivers/net/ethernet/ti/cpts.c
index 6f63c8729afc..b4ea58dc8caf 100644
--- a/drivers/net/ethernet/ti/cpts.c
+++ b/drivers/net/ethernet/ti/cpts.c
@@ -114,7 +114,10 @@ static bool cpts_match_tx_ts(struct cpts *cpts, struct cpts_event *event)
 			dev_consume_skb_any(skb);
 			dev_dbg(cpts->dev, "match tx timestamp mtype %u seqid %04x\n",
 				mtype, seqid);
-		} else if (time_after(jiffies, skb_cb->tmo)) {
+			break;
+		}
+
+		if (time_after(jiffies, skb_cb->tmo)) {
 			/* timeout any expired skbs over 1s */
 			dev_dbg(cpts->dev,
 				"expiring tx timestamp mtype %u seqid %04x\n",
-- 
2.17.1