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Commit 9401bb5c authored by Giuseppe CAVALLARO's avatar Giuseppe CAVALLARO Committed by David S. Miller
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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: default avatarGiuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1bb6dea8

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

+3 −6
Original line number Diff line number Diff line
@@ -2006,7 +2006,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit) 
#endif

	while (count < limit) {

		int status;

		struct dma_desc *p, *p_next;

		struct dma_desc *p;



		if (priv->extend_desc)

			p = (struct dma_desc *)(priv->dma_erx + entry);
@@ -2020,12 +2020,9 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit) 


		next_entry = (++priv->cur_rx) % rxsize;

		if (priv->extend_desc)

			p_next = (struct dma_desc *)(priv->dma_erx +

						     next_entry);

			prefetch(priv->dma_erx + next_entry);

		else

			p_next = priv->dma_rx + next_entry;



		prefetch(p_next);

			prefetch(priv->dma_rx + next_entry);



		/* read the status of the incoming frame */

		status = priv->hw->desc->rx_status(&priv->dev->stats,