From mboxrd@z Thu Jan 1 00:00:00 1970 From: Biao Huang Subject: [v2, PATCH 1/4] net: stmmac: update rx tail pointer register to fix rx dma hang issue. Date: Tue, 14 May 2019 10:28:50 +0800 Message-ID: <1557800933-30759-2-git-send-email-biao.huang@mediatek.com> References: <1557800933-30759-1-git-send-email-biao.huang@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1557800933-30759-1-git-send-email-biao.huang@mediatek.com> Sender: linux-kernel-owner@vger.kernel.org To: Jose Abreu , davem@davemloft.net Cc: Giuseppe Cavallaro , Alexandre Torgue , Maxime Coquelin , Matthias Brugger , netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, yt.shen@mediatek.com, biao.huang@mediatek.com, jianguo.zhang@mediatek.com List-Id: linux-mediatek@lists.infradead.org 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 --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 97c5e1a..906f2be 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -3336,6 +3336,7 @@ 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->rx_tail_addr, queue); } /** -- 1.7.9.5