net: stmmac: Check for DMA mapping errors
When DMA mapping an SKB fragment, the mapping must be checked for
errors, otherwise the DMA debug code will complain upon unmap.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index ce6d7e7..eba9088 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2079,6 +2079,8 @@
des = skb_frag_dma_map(priv->device, frag, 0,
skb_frag_size(frag),
DMA_TO_DEVICE);
+ if (dma_mapping_error(priv->device, des))
+ goto dma_map_err;
stmmac_tso_allocator(priv, des, skb_frag_size(frag),
(i == nfrags - 1));