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net: mvneta: Fix missing DMA region unmap

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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 is true only for the last fragment of the packet.

This is wrong, however, since every descriptor buffer is DMA mapped and needs
to be unmapped.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ezequiel Garcia 2014-05-30 13:40:06 -03:00 committed by David S. Miller
parent 8eef5f9723
commit ba7e46ef9d
1 changed files with 2 additions and 3 deletions
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5
drivers/net/ethernet/marvell/mvneta.c
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@ -1291,11 +1291,10 @@ static void mvneta_txq_bufs_free(struct mvneta_port *pp,
mvneta_txq_inc_get(txq);
if (!skb)
continue;
dma_unmap_single(pp->dev->dev.parent, tx_desc->buf_phys_addr,
tx_desc->data_size, DMA_TO_DEVICE);
if (!skb)
continue;
dev_kfree_skb_any(skb);
}
}