[PATCH v5 net-next 03/10] net: korina: Remove not needed cache flushes

Thomas Bogendoerfer
2021-04-16T08:52:27Z

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(-)

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);
}

--
2.29.2