r8169: fix performance regression related to PCIe max read request size

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It turned out that on low performance systems the original change can
cause lower tx performance. On a N3450-based mini-PC tx performance
in iperf3 was reduced from 950Mbps to ~900Mbps. Therefore effectively
revert the original change, just use pcie_set_readrq() now instead of
changing the PCIe capability register directly.

Fixes: 2df49d3654 ("r8169: remove fiddling with the PCIe max read request size")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Heiner Kallweit 2020-02-05 21:22:46 +01:00 • committed by David S. Miller

parent 7a02ea6502

commit 21b5f672fb

1 changed files with 6 additions and 0 deletions

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drivers/net/ethernet/realtek/r8169_main.c

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