linux-kernel - [PATCH 4.17 207/324] net: macb: Free RX ring for all queues

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Message-Id: <20180823075006.505473878@linuxfoundation.org>
Date:   Thu, 23 Aug 2018 09:54:33 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Harini Katakam <harini.katakam@...inx.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.17 207/324] net: macb: Free RX ring for all queues

4.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Harini Katakam <harini.katakam@...inx.com>

[ Upstream commit e50b770ea5c9eff0013e8ae714d20182ed50d5e6 ]

rx ring is allocated for all queues in macb_alloc_consistent.
Free the same for all queues instead of just Q0.

Signed-off-by: Harini Katakam <harini.katakam@...inx.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/cadence/macb_main.c |   11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -1818,13 +1818,7 @@ static void macb_free_consistent(struct
 	struct macb_queue *queue;
 	unsigned int q;
 
-	queue = &bp->queues[0];
 	bp->macbgem_ops.mog_free_rx_buffers(bp);
-	if (queue->rx_ring) {
-		dma_free_coherent(&bp->pdev->dev, RX_RING_BYTES(bp),
-				queue->rx_ring, queue->rx_ring_dma);
-		queue->rx_ring = NULL;
-	}
 
 	for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
 		kfree(queue->tx_skb);
@@ -1834,6 +1828,11 @@ static void macb_free_consistent(struct
 					  queue->tx_ring, queue->tx_ring_dma);
 			queue->tx_ring = NULL;
 		}
+		if (queue->rx_ring) {
+			dma_free_coherent(&bp->pdev->dev, RX_RING_BYTES(bp),
+					  queue->rx_ring, queue->rx_ring_dma);
+			queue->rx_ring = NULL;
+		}
 	}
 }