diff options
Diffstat (limited to 'target/linux/generic/pending-5.4/770-09-net-ethernet-mtk_eth_soc-only-read-the-full-rx-descr.patch')
| -rw-r--r-- | target/linux/generic/pending-5.4/770-09-net-ethernet-mtk_eth_soc-only-read-the-full-rx-descr.patch | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/target/linux/generic/pending-5.4/770-09-net-ethernet-mtk_eth_soc-only-read-the-full-rx-descr.patch b/target/linux/generic/pending-5.4/770-09-net-ethernet-mtk_eth_soc-only-read-the-full-rx-descr.patch deleted file mode 100644 index c2f5013e26..0000000000 --- a/target/linux/generic/pending-5.4/770-09-net-ethernet-mtk_eth_soc-only-read-the-full-rx-descr.patch +++ /dev/null @@ -1,44 +0,0 @@ -From: Felix Fietkau <nbd@nbd.name> -Date: Thu, 27 Aug 2020 09:24:25 +0200 -Subject: [PATCH] net: ethernet: mtk_eth_soc: only read the full rx - descriptor if DMA is done - -Uncached memory access is expensive, and there is no need to access all -descriptor words if we can't process them anyway - -Signed-off-by: Felix Fietkau <nbd@nbd.name> ---- - ---- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c -+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c -@@ -793,13 +793,18 @@ static inline int mtk_max_buf_size(int f - return buf_size; - } - --static inline void mtk_rx_get_desc(struct mtk_rx_dma *rxd, -+static inline bool mtk_rx_get_desc(struct mtk_rx_dma *rxd, - struct mtk_rx_dma *dma_rxd) - { -- rxd->rxd1 = READ_ONCE(dma_rxd->rxd1); - rxd->rxd2 = READ_ONCE(dma_rxd->rxd2); -+ if (!(rxd->rxd2 & RX_DMA_DONE)) -+ return false; -+ -+ rxd->rxd1 = READ_ONCE(dma_rxd->rxd1); - rxd->rxd3 = READ_ONCE(dma_rxd->rxd3); - rxd->rxd4 = READ_ONCE(dma_rxd->rxd4); -+ -+ return true; - } - - /* the qdma core needs scratch memory to be setup */ -@@ -1271,8 +1276,7 @@ static int mtk_poll_rx(struct napi_struc - rxd = &ring->dma[idx]; - data = ring->data[idx]; - -- mtk_rx_get_desc(&trxd, rxd); -- if (!(trxd.rxd2 & RX_DMA_DONE)) -+ if (!mtk_rx_get_desc(&trxd, rxd)) - break; - - /* find out which mac the packet come from. values start at 1 */ |