net: axienet: Factor out TX descriptor chain cleanup

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Factor out the code that cleans up a number of connected TX descriptors,
as we will need it to properly roll back a failed _xmit() call.
There are subtle differences between cleaning up a successfully sent
chain (unknown number of involved descriptors, total data size needed)
and a chain that was about to set up (number of descriptors known), so
cater for those variations with some extra parameters.

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 13:23:39 +00:00 • committed by David S. Miller

parent e7fea0b9d0

commit ab365c3393

1 changed files with 57 additions and 22 deletions

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drivers/net/ethernet/xilinx/xilinx_axienet_main.c

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