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bnx2: fix dma_get_ops compilation breakage 

This removes dma_get_ops() prefetch optimization in bnx2.

bnx2 uses dma_get_ops() to see if dma_sync_single_for_cpu() is
noop. bnx2 does prefetch if it's noop.

But dma_get_ops() isn't available on all the architectures (only the
architectures that uses dma_map_ops struct have it). Using
dma_get_ops() in drivers leads to compilation breakage on many
architectures.

This patch removes dma_get_ops() and changes bnx2 to do prefetch on
all the architectures. This adds useless prefetch on non-coherent
architectures but this is harmless. It is also unlikely to cause the
performance drop.

[ Remove now unused local variable 'pdev' -DaveM ]

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
FUJITA Tomonori 2010-06-17 08:56:05 -07:00 committed by David S. Miller
parent db176edc89
commit aabef8b240
1 changed files with 4 additions and 7 deletions
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11
drivers/net/bnx2.c
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@ -3073,7 +3073,6 @@ bnx2_rx_int(struct bnx2 *bp, struct bnx2_napi *bnapi, int budget)
u16 hw_cons, sw_cons, sw_ring_cons, sw_prod, sw_ring_prod;
struct l2_fhdr *rx_hdr;
int rx_pkt = 0, pg_ring_used = 0;
struct pci_dev *pdev = bp->pdev;
hw_cons = bnx2_get_hw_rx_cons(bnapi);
sw_cons = rxr->rx_cons;
@ -3099,12 +3098,10 @@ bnx2_rx_int(struct bnx2 *bp, struct bnx2_napi *bnapi, int budget)
skb = rx_buf->skb;
prefetchw(skb);
if (!get_dma_ops(&pdev->dev)->sync_single_for_cpu) {
next_rx_buf =
&rxr->rx_buf_ring[
RX_RING_IDX(NEXT_RX_BD(sw_cons))];
prefetch(next_rx_buf->desc);
}
next_rx_buf =
&rxr->rx_buf_ring[RX_RING_IDX(NEXT_RX_BD(sw_cons))];
prefetch(next_rx_buf->desc);
rx_buf->skb = NULL;
dma_addr = dma_unmap_addr(rx_buf, mapping);