From e92455397237c4e680302950fe1d7970b6c063a0 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Mon, 10 Apr 2017 11:15:24 +1000 Subject: [PATCH] ftgmac100: Don't clear tx desc fields unnecessarily Those are non-cachable stores, let's avoid those we don't need. Remove the helper, it's not particularly helpful and since it uses "priv" I can't move it to the header file. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: David S. Miller --- drivers/net/ethernet/faraday/ftgmac100.c | 17 ++++++----------- 1 file changed, 6 insertions(+), 11 deletions(-) diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index 802f5e73006c..d303c597e9b8 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -468,16 +468,6 @@ static bool ftgmac100_rx_packet(struct ftgmac100 *priv, int *processed) return true; } -static void ftgmac100_txdes_reset(const struct ftgmac100 *priv, - struct ftgmac100_txdes *txdes) -{ - /* clear all except end of ring bit */ - txdes->txdes0 &= cpu_to_le32(priv->txdes0_edotr_mask); - txdes->txdes1 = 0; - txdes->txdes2 = 0; - txdes->txdes3 = 0; -} - static bool ftgmac100_txdes_owned_by_dma(struct ftgmac100_txdes *txdes) { return txdes->txdes0 & cpu_to_le32(FTGMAC100_TXDES0_TXDMA_OWN); @@ -577,7 +567,12 @@ static void ftgmac100_free_tx_packet(struct ftgmac100 *priv, dev_kfree_skb(skb); priv->tx_skbs[pointer] = NULL; - ftgmac100_txdes_reset(priv, txdes); + /* Clear txdes0 except end of ring bit, clear txdes1 as we + * only "OR" into it, leave 2 and 3 alone as 2 is unused + * and 3 will be overwritten entirely + */ + txdes->txdes0 &= cpu_to_le32(priv->txdes0_edotr_mask); + txdes->txdes1 = 0; } static bool ftgmac100_tx_complete_packet(struct ftgmac100 *priv) -- GitLab