stmmac: merge get_rx_owner into rx_status routine.
The RDES0 register can be read several times while doing RX of a
packet.
This patch slightly improves RX path performance by reading rdes0
once for two operation: check rx owner, get rx status bits.
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 0194a8f..796d7c6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2205,7 +2205,11 @@
else
p = priv->dma_rx + entry;
- if (priv->hw->desc->get_rx_owner(p))
+ /* read the status of the incoming frame */
+ status = priv->hw->desc->rx_status(&priv->dev->stats,
+ &priv->xstats, p);
+ /* check if managed by the DMA otherwise go ahead */
+ if (unlikely(status & dma_own))
break;
count++;
@@ -2218,9 +2222,6 @@
else
prefetch(priv->dma_rx + next_entry);
- /* read the status of the incoming frame */
- status = priv->hw->desc->rx_status(&priv->dev->stats,
- &priv->xstats, p);
if ((priv->extend_desc) && (priv->hw->desc->rx_extended_status))
priv->hw->desc->rx_extended_status(&priv->dev->stats,
&priv->xstats,