[PATCH net-next] net: octeon: Fix dma_unmap_single() size

[Thomas Fourier]

re.s.addr is mapped in octeon_mgmt_rx_fill_ring() with size re.s.len
set to netdev->mtu + OCTEON_MGMT_RX_HEADROOM + 8 + NET_IP_ALIGN. It is
unmapped in octeon_mgmt_dequeue_rx_buffer() with
ETH_FRAME_LEN + OCTEON_MGMT_RX_HEADROOM.

Change unmap size to re.s.len.

Fixes: d6aa60a10b2f ("NET: Add Ethernet driver for Octeon MGMT devices.")
Signed-off-by: Thomas Fourier <fourier.thomas@xxxxxxxxx>
---
 drivers/net/ethernet/cavium/octeon/octeon_mgmt.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/cavium/octeon/octeon_mgmt.c b/drivers/net/ethernet/cavium/octeon/octeon_mgmt.c
index c190fc6538d4..92050716f103 100644
--- a/drivers/net/ethernet/cavium/octeon/octeon_mgmt.c
+++ b/drivers/net/ethernet/cavium/octeon/octeon_mgmt.c
@@ -380,9 +380,7 @@ static u64 octeon_mgmt_dequeue_rx_buffer(struct octeon_mgmt *p,
 	p->rx_current_fill--;
 	*pskb = __skb_dequeue(&p->rx_list);
 
-	dma_unmap_single(p->dev, re.s.addr,
-			 ETH_FRAME_LEN + OCTEON_MGMT_RX_HEADROOM,
-			 DMA_FROM_DEVICE);
+	dma_unmap_single(p->dev, re.s.addr, re.s.len, DMA_FROM_DEVICE);
 
 	return re.d64;
 }
-- 
2.53.0