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| author | Jonathan Lemon <jonathan.lemon@gmail.com> | 2022-04-24 09:53:07 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-12 12:17:07 +0200 |
| commit | c6e4ee692b8fc1c1b294684d27dd726dd0c8bf1b (patch) | |
| tree | 074385a1f2a0425b8bc10a9dab46153797233fed | |
| parent | 2327c385e837431d45db51cfcc7e8f965e5f1672 (diff) | |
| download | linux-c6e4ee692b8fc1c1b294684d27dd726dd0c8bf1b.tar.gz linux-c6e4ee692b8fc1c1b294684d27dd726dd0c8bf1b.tar.bz2 linux-c6e4ee692b8fc1c1b294684d27dd726dd0c8bf1b.zip | |
net: bcmgenet: hide status block before TX timestamping
[ Upstream commit acac0541d1d65e81e599ec399d34d184d2424401 ]
The hardware checksum offloading requires use of a transmit
status block inserted before the outgoing frame data, this was
updated in '9a9ba2a4aaaa ("net: bcmgenet: always enable status blocks")'
However, skb_tx_timestamp() assumes that it is passed a raw frame
and PTP parsing chokes on this status block.
Fix this by calling __skb_pull(), which hides the TSB before calling
skb_tx_timestamp(), so an outgoing PTP packet is parsed correctly.
As the data in the skb has already been set up for DMA, and the
dma_unmap_* calls use a separately stored address, there is no
no effective change in the data transmission.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20220424165307.591145-1-jonathan.lemon@gmail.com
Fixes: d03825fba459 ("net: bcmgenet: add skb_tx_timestamp call")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/broadcom/genet/bcmgenet.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c index b819a9bde6cc..9bb398d05837 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -1522,6 +1522,11 @@ static struct sk_buff *bcmgenet_put_tx_csum(struct net_device *dev, return skb; } +static void bcmgenet_hide_tsb(struct sk_buff *skb) +{ + __skb_pull(skb, sizeof(struct status_64)); +} + static netdev_tx_t bcmgenet_xmit(struct sk_buff *skb, struct net_device *dev) { struct bcmgenet_priv *priv = netdev_priv(dev); @@ -1632,6 +1637,8 @@ static netdev_tx_t bcmgenet_xmit(struct sk_buff *skb, struct net_device *dev) } GENET_CB(skb)->last_cb = tx_cb_ptr; + + bcmgenet_hide_tsb(skb); skb_tx_timestamp(skb); /* Decrement total BD count and advance our write pointer */ |