net: axienet: Check for DMA mapping errors

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Especially with the default 32-bit DMA mask, DMA buffers are a limited
resource, so their allocation can fail.
So as the DMA API documentation requires, add error checking code after
dma_map_single() calls to catch the case where we run out of "low" memory.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Andre Przywara 2020-03-24 13:23:40 +00:00 • committed by David S. Miller

parent ab365c3393

commit 71791dc8bd

1 changed files with 30 additions and 1 deletions

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31

drivers/net/ethernet/xilinx/xilinx_axienet_main.c

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