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stmmac: prefetch all dma_erx when use extend_desc
This patch is to prefetch, in the stmmac_rx, the whole dma_erx descriptor in case of using the extended descriptors. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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1 changed files with 3 additions and 6 deletions
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@ -2006,7 +2006,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
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#endif
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while (count < limit) {
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int status;
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struct dma_desc *p, *p_next;
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struct dma_desc *p;
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if (priv->extend_desc)
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p = (struct dma_desc *)(priv->dma_erx + entry);
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@ -2020,12 +2020,9 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
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next_entry = (++priv->cur_rx) % rxsize;
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if (priv->extend_desc)
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p_next = (struct dma_desc *)(priv->dma_erx +
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next_entry);
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prefetch(priv->dma_erx + next_entry);
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else
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p_next = priv->dma_rx + next_entry;
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prefetch(p_next);
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prefetch(priv->dma_rx + next_entry);
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/* read the status of the incoming frame */
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status = priv->hw->desc->rx_status(&priv->dev->stats,
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