2019-01-17 09:52:11

by Madalin-cristian Bucur

Subject: [PATCH] dpaa_eth: NETIF_F_LLTX requires to do our own update of trans_start

As txq_trans_update() only updates trans_start when the lock is held,
trans_start does not get updated if NETIF_F_LLTX is declared.

Signed-off-by: Madalin Bucur <[email protected]>
---
drivers/net/ethernet/freescale/dpaa/dpaa_eth.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
index f53090cde041..dfebc30c4841 100644
--- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
@@ -2051,6 +2051,7 @@ dpaa_start_xmit(struct sk_buff *skb, struct net_device *net_dev)
bool nonlinear = skb_is_nonlinear(skb);
struct rtnl_link_stats64 *percpu_stats;
struct dpaa_percpu_priv *percpu_priv;
+ struct netdev_queue *txq;
struct dpaa_priv *priv;
struct qm_fd fd;
int offset = 0;
@@ -2100,6 +2101,11 @@ dpaa_start_xmit(struct sk_buff *skb, struct net_device *net_dev)
if (unlikely(err < 0))
goto skb_to_fd_failed;

+ txq = netdev_get_tx_queue(net_dev, queue_mapping);
+
+ /* LLTX requires to do our own update of trans_start */
+ txq->trans_start = jiffies;
+
if (priv->tx_tstamp && skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) {
fd.cmd |= cpu_to_be32(FM_FD_CMD_UPD);
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
--
2.1.0

2019-01-18 06:02:39

by David Miller

Subject: Re: [PATCH] dpaa_eth: NETIF_F_LLTX requires to do our own update of trans_start

From: Madalin Bucur <[email protected]>
Date: Thu, 17 Jan 2019 11:42:27 +0200

> As txq_trans_update() only updates trans_start when the lock is held,
> trans_start does not get updated if NETIF_F_LLTX is declared.
>
> Signed-off-by: Madalin Bucur <[email protected]>

Applied.