From e864b4c7b184bde36fa6a02bb3190983d2f796f9 Mon Sep 17 00:00:00 2001 From: Marcin Wojtas Date: Thu, 3 Dec 2015 15:20:49 +0100 Subject: [PATCH] net: mvpp2: fix missing DMA region unmap in egress processing The Tx descriptor release code currently calls dma_unmap_single() and dev_kfree_skb_any() if the descriptor is associated with a non-NULL skb. This condition is true only for the last fragment of the packet. Since every descriptor's buffer is DMA-mapped it has to be properly unmapped. Signed-off-by: Marcin Wojtas Fixes: 3f518509dedc ("ethernet: Add new driver for Marvell Armada 375 network unit") Cc: # v3.18+ Signed-off-by: David S. Miller --- drivers/net/ethernet/marvell/mvpp2.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/marvell/mvpp2.c b/drivers/net/ethernet/marvell/mvpp2.c index d9884fd15b45..95db519d9901 100644 --- a/drivers/net/ethernet/marvell/mvpp2.c +++ b/drivers/net/ethernet/marvell/mvpp2.c @@ -4401,11 +4401,10 @@ static void mvpp2_txq_bufs_free(struct mvpp2_port *port, mvpp2_txq_inc_get(txq_pcpu); - if (!skb) - continue; - dma_unmap_single(port->dev->dev.parent, buf_phys_addr, skb_headlen(skb), DMA_TO_DEVICE); + if (!skb) + continue; dev_kfree_skb_any(skb); } } -- 2.20.1