net: ethernet: mtk_eth_soc: cache HW pointer of last freed TX descriptor

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The value is only updated by the CPU, so it is cheaper to access from the
ring data structure than from a hardware register.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Felix Fietkau 2021-04-22 22:21:03 -07:00 • committed by David S. Miller

parent e9229ffd55

commit 4e6bf60956

2 changed files with 6 additions and 4 deletions

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8

drivers/net/ethernet/mediatek/mtk_eth_soc.c

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2

drivers/net/ethernet/mediatek/mtk_eth_soc.h

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