Commit 656121b1 authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by Jakub Kicinski
Browse files

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: 514aac35 ("net: airoha: Add missing cleanup bits in airoha_qdma_cleanup_rx_queue()")
Signed-off-by: default avatarLorenzo 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: default avatarJakub Kicinski <kuba@kernel.org>
parent ed45d380

drivers/net/ethernet/airoha/airoha_eth.c

+5 −0
Original line number Diff line number Diff line
@@ -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));

}