From: Stefan Sørensen <stefan.sorensen@spectralink.com>
Date: Tue, 3 Nov 2015 08:34:06 +0000 (+0100)
Subject: dp83640: Prune rx timestamp list before reading from it
X-Git-Tag: v4.4-rc1~141^2~12^2~2
X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-linux.git;a=commitdiff_plain;h=ccf6ee9a6980eff9ec0eeaa8f63c65bff34d9697

dp83640: Prune rx timestamp list before reading from it

The list of rx timestamps are currently only pruned of old entries when a
new entry is inserted. If no new entries are added, old timestamps may
survive beyond their lifetime, possible causing them to be attached to
packets with the same sequence number after a rollover.

Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c
index 69a2f56e4d68..39ac633e3ef5 100644
--- a/drivers/net/phy/dp83640.c
+++ b/drivers/net/phy/dp83640.c
@@ -1398,6 +1398,7 @@ static bool dp83640_rxtstamp(struct phy_device *phydev,
 		return false;
 
 	spin_lock_irqsave(&dp83640->rx_lock, flags);
+	prune_rx_ts(dp83640);
 	list_for_each_safe(this, next, &dp83640->rxts) {
 		rxts = list_entry(this, struct rxts, list);
 		if (match(skb, type, rxts)) {