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net: airoha: Add missing RX_CPU_IDX() configuration in airoha_qdma_cleanup_rx_queue() 

When the descriptor index written in REG_RX_CPU_IDX() is equal to the one
stored in REG_RX_DMA_IDX(), the hw will stop since the QDMA RX ring is
empty.
Add missing REG_RX_CPU_IDX() configuration in airoha_qdma_cleanup_rx_queue
routine during QDMA RX ring cleanup.

Fixes: 514aac3599 ("net: airoha: Add missing cleanup bits in airoha_qdma_cleanup_rx_queue()")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20260408-airoha-cpu-idx-airoha_qdma_cleanup_rx_queue-v1-1-8efa64844308@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
master
Lorenzo Bianconi 2026-04-08 20:26:56 +02:00 committed by Jakub Kicinski
parent ed45d380c5
commit 656121b155
1 changed files with 5 additions and 0 deletions
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5
drivers/net/ethernet/airoha/airoha_eth.c
View File

@ -825,6 +825,11 @@ static void airoha_qdma_cleanup_rx_queue(struct airoha_queue *q)
}
q->head = q->tail;
/* Set RX_DMA_IDX to RX_CPU_IDX to notify the hw the QDMA RX ring is
* empty.
*/
airoha_qdma_rmw(qdma, REG_RX_CPU_IDX(qid), RX_RING_CPU_IDX_MASK,
FIELD_PREP(RX_RING_CPU_IDX_MASK, q->head));
airoha_qdma_rmw(qdma, REG_RX_DMA_IDX(qid), RX_RING_DMA_IDX_MASK,
FIELD_PREP(RX_RING_DMA_IDX_MASK, q->tail));
}