diff options
| author | Giuseppe CAVALLARO <peppe.cavallaro@st.com> | 2013-04-08 02:10:03 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-04-08 16:55:27 -0400 |
| commit | 9401bb5c339d2f9529b2f859638440ce92227c83 (patch) | |
| tree | b870797f96984bcd84ab0f5498cb49aa2d181b27 | |
| parent | 1bb6dea8cc208e6bac824fcdaa3dc63d38901ca7 (diff) | |
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>
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 9 |
1 files 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 8ba05327851..71b64857e3a 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, |