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Date: Fri, 10 Mar 2017 17:34:57 +0100 From: Thierry Reding <thierry.reding@...il.com> To: "David S . Miller" <davem@...emloft.net> Cc: Giuseppe Cavallaro <peppe.cavallaro@...com>, Alexandre Torgue <alexandre.torgue@...com>, Joao Pinto <Joao.Pinto@...opsys.com>, Jon Hunter <jonathanh@...dia.com>, Mikko Perttunen <cyndis@...si.fi>, netdev@...r.kernel.org, linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH v2 5/9] net: stmmac: Check for DMA mapping errors From: Thierry Reding <treding@...dia.com> 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@...dia.com> --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index ce6d7e791f3f..eba9088e1f61 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -2079,6 +2079,8 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev) 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)); -- 2.12.0
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