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authorYangbo Lu2021-04-27 12:22:00 +0800
committerDavid S. Miller2021-04-27 14:10:15 -0700
commitc4b364ce1270d689ee5010001344b8eae3685f32 (patch)
tree9067cf9a35e95a99308d823ba9b2db06165fb8ae /drivers/net
parent5c5416f5d4c75fe6aba56f6c2c45a070b5e7cc78 (diff)
net: dsa: free skb->cb usage in core driver
Free skb->cb usage in core driver and let device drivers decide to use or not. The reason having a DSA_SKB_CB(skb)->clone was because dsa_skb_tx_timestamp() which may set the clone pointer was called before p->xmit() which would use the clone if any, and the device driver has no way to initialize the clone pointer. This patch just put memset(skb->cb, 0, sizeof(skb->cb)) at beginning of dsa_slave_xmit(). Some new features in the future, like one-step timestamp may need more bytes of skb->cb to use in dsa_skb_tx_timestamp(), and p->xmit(). Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/dsa/ocelot/felix.c2
-rw-r--r--drivers/net/dsa/sja1105/sja1105_main.c2
-rw-r--r--drivers/net/dsa/sja1105/sja1105_ptp.c4
-rw-r--r--drivers/net/ethernet/mscc/ocelot.c6
-rw-r--r--drivers/net/ethernet/mscc/ocelot_net.c2
5 files changed, 8 insertions, 8 deletions
diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index fe7e8bad90df..b28280b6e91a 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c
@@ -1408,7 +1408,7 @@ static void felix_txtstamp(struct dsa_switch *ds, int port,
return;
ocelot_port_add_txtstamp_skb(ocelot, port, clone);
- DSA_SKB_CB(skb)->clone = clone;
+ OCELOT_SKB_CB(skb)->clone = clone;
}
}
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index d9c198ca0197..405024b637d6 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -3137,7 +3137,7 @@ static void sja1105_port_deferred_xmit(struct kthread_work *work)
struct sk_buff *skb;
while ((skb = skb_dequeue(&sp->xmit_queue)) != NULL) {
- struct sk_buff *clone = DSA_SKB_CB(skb)->clone;
+ struct sk_buff *clone = SJA1105_SKB_CB(skb)->clone;
mutex_lock(&priv->mgmt_lock);
diff --git a/drivers/net/dsa/sja1105/sja1105_ptp.c b/drivers/net/dsa/sja1105/sja1105_ptp.c
index a5140084000d..0bc566b9e958 100644
--- a/drivers/net/dsa/sja1105/sja1105_ptp.c
+++ b/drivers/net/dsa/sja1105/sja1105_ptp.c
@@ -432,7 +432,7 @@ bool sja1105_port_rxtstamp(struct dsa_switch *ds, int port,
}
/* Called from dsa_skb_tx_timestamp. This callback is just to clone
- * the skb and have it available in DSA_SKB_CB in the .port_deferred_xmit
+ * the skb and have it available in SJA1105_SKB_CB in the .port_deferred_xmit
* callback, where we will timestamp it synchronously.
*/
void sja1105_port_txtstamp(struct dsa_switch *ds, int port, struct sk_buff *skb)
@@ -448,7 +448,7 @@ void sja1105_port_txtstamp(struct dsa_switch *ds, int port, struct sk_buff *skb)
if (!clone)
return;
- DSA_SKB_CB(skb)->clone = clone;
+ SJA1105_SKB_CB(skb)->clone = clone;
}
static int sja1105_ptp_reset(struct dsa_switch *ds)
diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index 8d06ffaf318a..7da2dd1632b1 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -538,8 +538,8 @@ void ocelot_port_add_txtstamp_skb(struct ocelot *ocelot, int port,
spin_lock(&ocelot_port->ts_id_lock);
skb_shinfo(clone)->tx_flags |= SKBTX_IN_PROGRESS;
- /* Store timestamp ID in cb[0] of sk_buff */
- clone->cb[0] = ocelot_port->ts_id;
+ /* Store timestamp ID in OCELOT_SKB_CB(clone)->ts_id */
+ OCELOT_SKB_CB(clone)->ts_id = ocelot_port->ts_id;
ocelot_port->ts_id = (ocelot_port->ts_id + 1) % 4;
skb_queue_tail(&ocelot_port->tx_skbs, clone);
@@ -604,7 +604,7 @@ void ocelot_get_txtstamp(struct ocelot *ocelot)
spin_lock_irqsave(&port->tx_skbs.lock, flags);
skb_queue_walk_safe(&port->tx_skbs, skb, skb_tmp) {
- if (skb->cb[0] != id)
+ if (OCELOT_SKB_CB(skb)->ts_id != id)
continue;
__skb_unlink(skb, &port->tx_skbs);
skb_match = skb;
diff --git a/drivers/net/ethernet/mscc/ocelot_net.c b/drivers/net/ethernet/mscc/ocelot_net.c
index 36f32a4d9b0f..789a5fba146c 100644
--- a/drivers/net/ethernet/mscc/ocelot_net.c
+++ b/drivers/net/ethernet/mscc/ocelot_net.c
@@ -520,7 +520,7 @@ static netdev_tx_t ocelot_port_xmit(struct sk_buff *skb, struct net_device *dev)
ocelot_port_add_txtstamp_skb(ocelot, port, clone);
- rew_op |= clone->cb[0] << 3;
+ rew_op |= OCELOT_SKB_CB(clone)->ts_id << 3;
}
}