[PATCH net] net: mvneta: fix the Rx desc buffer DMA unmapping

From: Antoine Tenart
Date: Wed Sep 19 2018 - 09:35:15 EST

With CONFIG_DMA_API_DEBUG enabled we now get a warning when using the
mvneta driver:

mvneta d0030000.ethernet: DMA-API: device driver frees DMA memory with
wrong function [device address=0x000000001165b000] [size=4096 bytes]
[mapped as page] [unmapped as single]

This is because when using the s/w buffer management, the Rx descriptor
buffer is mapped with dma_map_page but unmapped with dma_unmap_single.
This patch fixes this by using the right unmapping function.

Fixes: 562e2f467e71 ("net: mvneta: Improve the buffer allocation method for SWBM")
Signed-off-by: Antoine Tenart <antoine.tenart@xxxxxxxxxxx>
drivers/net/ethernet/marvell/mvneta.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index bc80a678abc3..2db9708f2e24 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -2008,8 +2008,8 @@ static int mvneta_rx_swbm(struct napi_struct *napi,
skb_add_rx_frag(rxq->skb, frag_num, page,
frag_offset, frag_size,
- dma_unmap_single(dev->dev.parent, phys_addr,
+ dma_unmap_page(dev->dev.parent, phys_addr,
rxq->left_size -= frag_size;
} else {