| Message ID | 20241004-airoha-eth-7581-mapping-fix-v1-1-8e4279ab1812@kernel.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [net] net: airoha: Update tx cpu dma ring idx at the end of xmit loop | expand |
On Fri, Oct 04, 2024 at 03:51:26PM +0200, Lorenzo Bianconi wrote: > 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>
Hello: This patch was applied to netdev/net.git (main) by Jakub Kicinski <kuba@kernel.org>: On Fri, 04 Oct 2024 15:51:26 +0200 you wrote: > 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> > > [...] Here is the summary with links: - [net] net: airoha: Update tx cpu dma ring idx at the end of xmit loop https://git.kernel.org/netdev/net/c/3dc6e998d18b You are awesome, thank you!
diff --git a/drivers/net/ethernet/mediatek/airoha_eth.c b/drivers/net/ethernet/mediatek/airoha_eth.c index 930f180688e5caf1175481a43d243812bc07be07..2c26eb185283725ff50803437dac5143d7884b5a 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);
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> --- drivers/net/ethernet/mediatek/airoha_eth.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) --- base-commit: 096c0fa42afa92b6ffa4e441c4c72a2f805c5a88 change-id: 20241004-airoha-eth-7581-mapping-fix-919481cbb340 Best regards,