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net: stmmac: update rx tail pointer register to fix rx dma hang issue.

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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

Fixes: 54139cf3bb ("net: stmmac: adding multiple buffers for rx")
Signed-off-by: Biao Huang <biao.huang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Biao Huang 2019-05-24 14:26:07 +08:00 committed by David S. Miller
parent 425aa0e1d0
commit 4523a56115
1 changed files with 1 additions and 0 deletions
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drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@ -3338,6 +3338,7 @@ 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);
}
/**