mv643xx_eth: fix receive buffer DMA unmapping

When tearing down a DMA mapping for a receive buffer, we should pass
dma_unmap_single() the exact same address that dma_map_single() gave
us when we originally set up the mapping.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>

diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index deee66d..ad2ae93 100644 (file)
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -559,7 +559,7 @@ static int rxq_process(struct rx_queue *rxq, int budget)
 
                spin_unlock_irqrestore(&mp->lock, flags);
 
-               dma_unmap_single(NULL, rx_desc->buf_ptr + 2,
+               dma_unmap_single(NULL, rx_desc->buf_ptr,
                                 rx_desc->buf_size, DMA_FROM_DEVICE);
                rxq->rx_desc_count--;
                rx++;