lan743x: sync only the received area of an rx ring buffer

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On cpu architectures w/o dma cache snooping, dma_unmap() is a
is a very expensive operation, because its resulting sync
needs to invalidate cpu caches.

Increase efficiency/performance by syncing only those sections
of the lan743x's rx ring buffers that are actually in use.

Signed-off-by: Sven Van Asbroeck <thesven73@gmail.com>
Reviewed-by: Bryan Whitehead <Bryan.Whitehead@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Sven Van Asbroeck 2021-02-15 20:08:03 -05:00 • committed by David S. Miller

parent a8db76d40e

commit 966df6ded2

1 changed files with 26 additions and 9 deletions

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drivers/net/ethernet/microchip/lan743x_main.c

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