Commit 8c487c21 authored by Eric Dumazet's avatar Eric Dumazet Committed by Ben Hutchings

net: bcmgenet: fix dma api length mismatch

commit eee57723 upstream.

When un-mapping skb->data in __bcmgenet_tx_reclaim(),
we must use the length that was used in original dma_map_single(),
instead of skb->len that might be bigger (includes the frags)

We simply can store skb_len into tx_cb_ptr->dma_len and use it
at unmap time.

Fixes: 1c1008c7 ("net: bcmgenet: add main driver file")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Acked-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
parent 5c1e8c82
...@@ -905,7 +905,7 @@ static void __bcmgenet_tx_reclaim(struct net_device *dev, ...@@ -905,7 +905,7 @@ static void __bcmgenet_tx_reclaim(struct net_device *dev,
dev->stats.tx_bytes += tx_cb_ptr->skb->len; dev->stats.tx_bytes += tx_cb_ptr->skb->len;
dma_unmap_single(&dev->dev, dma_unmap_single(&dev->dev,
dma_unmap_addr(tx_cb_ptr, dma_addr), dma_unmap_addr(tx_cb_ptr, dma_addr),
tx_cb_ptr->skb->len, dma_unmap_len(tx_cb_ptr, dma_len),
DMA_TO_DEVICE); DMA_TO_DEVICE);
bcmgenet_free_cb(tx_cb_ptr); bcmgenet_free_cb(tx_cb_ptr);
} else if (dma_unmap_addr(tx_cb_ptr, dma_addr)) { } else if (dma_unmap_addr(tx_cb_ptr, dma_addr)) {
...@@ -990,7 +990,7 @@ static int bcmgenet_xmit_single(struct net_device *dev, ...@@ -990,7 +990,7 @@ static int bcmgenet_xmit_single(struct net_device *dev,
} }
dma_unmap_addr_set(tx_cb_ptr, dma_addr, mapping); dma_unmap_addr_set(tx_cb_ptr, dma_addr, mapping);
dma_unmap_len_set(tx_cb_ptr, dma_len, skb->len); dma_unmap_len_set(tx_cb_ptr, dma_len, skb_len);
length_status = (skb_len << DMA_BUFLENGTH_SHIFT) | dma_desc_flags | length_status = (skb_len << DMA_BUFLENGTH_SHIFT) | dma_desc_flags |
(priv->hw_params->qtag_mask << DMA_TX_QTAG_SHIFT) | (priv->hw_params->qtag_mask << DMA_TX_QTAG_SHIFT) |
DMA_TX_APPEND_CRC; DMA_TX_APPEND_CRC;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment