net: ethernet: cortina: Count RX descriptors for freeq refill

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The software free queue provides one buffer fragment for every descriptor
moved to an RX queue. The refill heuristic instead advances by NAPI work,
which counts frames. A fragmented or discarded frame can consume several
queue entries while adding only one to the refill count.

Count the RX descriptors as they are consumed and report that separately
from NAPI work. Use the descriptor count to drive free queue refills.

Fixes: 4d5ae32f5e ("net: ethernet: Add a driver for Gemini gigabit ethernet")
Assisted-by: LLM
Reviewed-by: Joe Damato <joe@dama.to>
Signed-off-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260903-gemini-ethernet-fixes-v2-5-2bbbd598ca6e@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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Linus Walleij 2026-09-03 23:45:33 +02:00 • committed by Paolo Abeni

parent 6520198c43

commit e89e88ad41

1 changed files with 8 additions and 3 deletions

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drivers/net/ethernet/cortina/gemini.c

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