net: axienet: Improve DMA error handling

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Since 0 is a valid DMA address, we cannot use the physical address to
check whether a TX descriptor is valid and is holding a DMA mapping.

Use the "cntrl" member of the descriptor to make this decision, as it
contains at least the length of the buffer, so 0 points to an
uninitialised buffer.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Andre Przywara 2020-03-24 13:23:38 +00:00 • committed by David S. Miller

parent f26667a373

commit e7fea0b9d0

1 changed files with 2 additions and 2 deletions

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drivers/net/ethernet/xilinx/xilinx_axienet_main.c

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