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[v4,net-next,03/10] net: korina: Remove not needed cache flushes

Message ID 20210416084712.62561-4-tsbogend@alpha.franken.de (mailing list archive)
State Superseded
Headers show
Series net: Korina improvements | expand

Commit Message

Thomas Bogendoerfer April 16, 2021, 8:47 a.m. UTC 
Descriptors are mapped uncached so there is no need to do any cache
handling for them.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 drivers/net/ethernet/korina.c | 6 ------
 1 file changed, 6 deletions(-)
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Patch

diff --git a/drivers/net/ethernet/korina.c b/drivers/net/ethernet/korina.c
index b56de01f6bb8..c7abb4a8dd37 100644
--- a/drivers/net/ethernet/korina.c
+++ b/drivers/net/ethernet/korina.c
@@ -231,7 +231,6 @@  static int korina_send_packet(struct sk_buff *skb, struct net_device *dev)
 	dma_cache_wback((u32)skb->data, skb->len);
 
 	/* Setup the transmit descriptor. */
-	dma_cache_inv((u32) td, sizeof(*td));
 	td->ca = CPHYSADDR(skb->data);
 	chain_prev = (lp->tx_chain_tail - 1) & KORINA_TDS_MASK;
 	chain_next = (lp->tx_chain_tail + 1) & KORINA_TDS_MASK;
@@ -284,7 +283,6 @@  static int korina_send_packet(struct sk_buff *skb, struct net_device *dev)
 			lp->tx_chain_tail = chain_next;
 		}
 	}
-	dma_cache_wback((u32) td, sizeof(*td));
 
 	netif_trans_update(dev);
 	spin_unlock_irqrestore(&lp->lock, flags);
@@ -373,8 +371,6 @@  static int korina_rx(struct net_device *dev, int limit)
 	u32 devcs, pkt_len, dmas;
 	int count;
 
-	dma_cache_inv((u32)rd, sizeof(*rd));
-
 	for (count = 0; count < limit; count++) {
 		skb = lp->rx_skb[lp->rx_next_done];
 		skb_new = NULL;
@@ -453,7 +449,6 @@  static int korina_rx(struct net_device *dev, int limit)
 			~DMA_DESC_COD;
 
 		lp->rx_next_done = (lp->rx_next_done + 1) & KORINA_RDS_MASK;
-		dma_cache_wback((u32)rd, sizeof(*rd));
 		rd = &lp->rd_ring[lp->rx_next_done];
 		writel(~DMA_STAT_DONE, &lp->rx_dma_regs->dmas);
 	}
@@ -468,7 +463,6 @@  static int korina_rx(struct net_device *dev, int limit)
 		rd->devcs = 0;
 		skb = lp->rx_skb[lp->rx_next_done];
 		rd->ca = CPHYSADDR(skb->data);
-		dma_cache_wback((u32)rd, sizeof(*rd));
 		korina_chain_rx(lp, rd);
 	}