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Christian Marangi
49d7ee7d5b
Backport upstream memory leak patch merged upstream and even more
preliminary patch for multi-serdes rewrk.
(cherry picked from commit 155c610962)
Link: https://github.com/openwrt/openwrt/pull/23046
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
35 lines
1.4 KiB
Diff
35 lines
1.4 KiB
Diff
From 656121b155030086b01cfce9bd31b0c925ee6860 Mon Sep 17 00:00:00 2001
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From: Lorenzo Bianconi <lorenzo@kernel.org>
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Date: Wed, 8 Apr 2026 20:26:56 +0200
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Subject: [PATCH] net: airoha: Add missing RX_CPU_IDX() configuration in
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airoha_qdma_cleanup_rx_queue()
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When the descriptor index written in REG_RX_CPU_IDX() is equal to the one
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stored in REG_RX_DMA_IDX(), the hw will stop since the QDMA RX ring is
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empty.
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Add missing REG_RX_CPU_IDX() configuration in airoha_qdma_cleanup_rx_queue
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routine during QDMA RX ring cleanup.
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Fixes: 514aac359987 ("net: airoha: Add missing cleanup bits in airoha_qdma_cleanup_rx_queue()")
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Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
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Link: https://patch.msgid.link/20260408-airoha-cpu-idx-airoha_qdma_cleanup_rx_queue-v1-1-8efa64844308@kernel.org
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Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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---
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drivers/net/ethernet/airoha/airoha_eth.c | 5 +++++
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1 file changed, 5 insertions(+)
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--- a/drivers/net/ethernet/airoha/airoha_eth.c
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+++ b/drivers/net/ethernet/airoha/airoha_eth.c
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@@ -824,6 +824,11 @@ static void airoha_qdma_cleanup_rx_queue
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}
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q->head = q->tail;
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+ /* Set RX_DMA_IDX to RX_CPU_IDX to notify the hw the QDMA RX ring is
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+ * empty.
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+ */
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+ airoha_qdma_rmw(qdma, REG_RX_CPU_IDX(qid), RX_RING_CPU_IDX_MASK,
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+ FIELD_PREP(RX_RING_CPU_IDX_MASK, q->head));
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airoha_qdma_rmw(qdma, REG_RX_DMA_IDX(qid), RX_RING_DMA_IDX_MASK,
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FIELD_PREP(RX_RING_DMA_IDX_MASK, q->tail));
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}
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