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| author | Lorenzo Bianconi <lorenzo@kernel.org> | 2024-10-04 15:51:26 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-10-07 17:29:22 -0700 |
| commit | 3dc6e998d18bfba6e0dc979d3cc68eba98dfeef7 (patch) | |
| tree | 0c9fdc41e1acea55d0b7024a95eeedb2e062867b /drivers | |
| parent | f50b5d74c68e551667e265123659b187a30fe3a5 (diff) | |
| download | lwn-3dc6e998d18bfba6e0dc979d3cc68eba98dfeef7.tar.gz lwn-3dc6e998d18bfba6e0dc979d3cc68eba98dfeef7.zip | |
net: airoha: Update tx cpu dma ring idx at the end of xmit loop
Move the tx cpu dma ring index update out of transmit loop of
airoha_dev_xmit routine in order to not start transmitting the packet
before it is fully DMA mapped (e.g. fragmented skbs).
Fixes: 23020f049327 ("net: airoha: Introduce ethernet support for EN7581 SoC")
Reported-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20241004-airoha-eth-7581-mapping-fix-v1-1-8e4279ab1812@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/mediatek/airoha_eth.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/net/ethernet/mediatek/airoha_eth.c b/drivers/net/ethernet/mediatek/airoha_eth.c index 930f180688e5..2c26eb185283 100644 --- a/drivers/net/ethernet/mediatek/airoha_eth.c +++ b/drivers/net/ethernet/mediatek/airoha_eth.c @@ -2471,10 +2471,6 @@ static netdev_tx_t airoha_dev_xmit(struct sk_buff *skb, e->dma_addr = addr; e->dma_len = len; - airoha_qdma_rmw(qdma, REG_TX_CPU_IDX(qid), - TX_RING_CPU_IDX_MASK, - FIELD_PREP(TX_RING_CPU_IDX_MASK, index)); - data = skb_frag_address(frag); len = skb_frag_size(frag); } @@ -2483,6 +2479,11 @@ static netdev_tx_t airoha_dev_xmit(struct sk_buff *skb, q->queued += i; skb_tx_timestamp(skb); + if (!netdev_xmit_more()) + airoha_qdma_rmw(qdma, REG_TX_CPU_IDX(qid), + TX_RING_CPU_IDX_MASK, + FIELD_PREP(TX_RING_CPU_IDX_MASK, q->head)); + if (q->ndesc - q->queued < q->free_thr) netif_tx_stop_queue(txq); |