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

[Thomas Fourier]

In xgene_enet_refill_pagepool(), the skb->data is dma-mapped with length
len which is set to XGENE_ENET_STD_MTU which equals 1536. However, in
xgene_enet_delete_bufpool(), the same buffer is unmapped with length
XGENE_ENET_MAX_MTU which is 9600. This may erroneously unmap other
DMA buffers or cause other issues.

Change unmap length to XGENE_ENET_STD_MTU.

Fixes: 6e434627bce2 ("drivers: net: xgene: fix: Add dma_unmap_single")
Signed-off-by: Thomas Fourier <fourier.thomas@xxxxxxxxx>
---
 drivers/net/ethernet/apm/xgene/xgene_enet_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
index 507db46daf2b..2ddcbf27014e 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
@@ -185,7 +185,7 @@ static void xgene_enet_delete_bufpool(struct xgene_enet_desc_ring *buf_pool)
 
 			raw_desc = &buf_pool->raw_desc16[i];
 			dma_addr = GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1));
-			dma_unmap_single(dev, dma_addr, XGENE_ENET_MAX_MTU,
+			dma_unmap_single(dev, dma_addr, XGENE_ENET_STD_MTU,
 					 DMA_FROM_DEVICE);
 		}
 	}
-- 
2.53.0