From 9401bb5c339d2f9529b2f859638440ce92227c83 Mon Sep 17 00:00:00 2001 From: Giuseppe CAVALLARO Date: Mon, 8 Apr 2013 02:10:03 +0000 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 8ba05327851a..71b64857e3a6 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -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, -- 2.20.1