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Date: Sun, 28 Apr 2019 14:30:04 +0800 From: Biao Huang <biao.huang@...iatek.com> To: Jose Abreu <joabreu@...opsys.com>, <davem@...emloft.net> CC: Giuseppe Cavallaro <peppe.cavallaro@...com>, Alexandre Torgue <alexandre.torgue@...com>, Maxime Coquelin <mcoquelin.stm32@...il.com>, Matthias Brugger <matthias.bgg@...il.com>, <netdev@...r.kernel.org>, <linux-stm32@...md-mailman.stormreply.com>, <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, <linux-mediatek@...ts.infradead.org>, <yt.shen@...iatek.com>, <biao.huang@...iatek.com>, <jianguo.zhang@...iatek.com> Subject: [PATCH 1/6] net: stmmac: update rx tail pointer register to fix rx dma hang issue. Currently we will not update the receive descriptor tail pointer in stmmac_rx_refill. Rx dma will think no available descriptors and stop once received packets exceed DMA_RX_SIZE, so that the rx only test will fail. Update the receive tail pointer in stmmac_rx_refill to add more descriptors to the rx channel, so packets can be received continually Signed-off-by: Biao Huang <biao.huang@...iatek.com> --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 97c5e1a..818ad88 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -3336,6 +3336,9 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv, u32 queue) entry = STMMAC_GET_ENTRY(entry, DMA_RX_SIZE); } rx_q->dirty_rx = entry; + stmmac_set_rx_tail_ptr(priv, priv->ioaddr, + rx_q->dma_rx_phy + (entry * sizeof(struct dma_desc)), + queue); } /** -- 1.7.9.5
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