Merge branch 'axienet-fixes'

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Andy Chiu says:

====================
net: axienet: fix DMA Tx error

We ran into multiple DMA TX errors while writing files over a network
block device running on top of a DMA-connected AXI Ethernet device on
64-bit RISC-V machines. The errors indicated that the DMA had fetched a
null descriptor and we found that the reason for this is that AXI DMA had
unexpectedly processed a partially updated tail descriptor pointer. To
fix it, we suggest that the driver should use one 64-bit write instead
of two 32-bit writes to perform such update if possible. For those
archectures where double-word load/stores are unavailable, e.g. 32-bit
archectures, force a driver probe failure if the driver finds 64-bit
capability on DMA.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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David S. Miller 2022-06-13 12:36:56 +01:00

parent a5b00f5b78 b690f8df64

commit a7ffce959c

2 changed files with 55 additions and 24 deletions

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51

drivers/net/ethernet/xilinx/xilinx_axienet.h

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28

drivers/net/ethernet/xilinx/xilinx_axienet_main.c

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