net: macb: Apply RXUBR workaround only to versions with errata
[ Upstream commit e501070e4db0b67a4c17a5557d1e9d098f3db310 ] The interrupt handler contains a workaround for RX hang applicable to Zynq and AT91RM9200 only. Subsequent versions do not need this workaround. This workaround unnecessarily resets RX whenever RX used bit read is observed, which can be often under heavy traffic. There is no other action performed on RX UBR interrupt. Hence introduce a CAPS mask; enable this interrupt and workaround only on affected versions. Signed-off-by: NHarini Katakam <harini.katakam@xilinx.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net> Signed-off-by: NSasha Levin <sashal@kernel.org>
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