netdev - [PATCH net-next 2/5] dpaa2-eth: check the result of skb_to

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Message-Id: <20200624113421.17360-3-ioana.ciornei@nxp.com>
Date:   Wed, 24 Jun 2020 14:34:18 +0300
From:   Ioana Ciornei <ioana.ciornei@....com>
To:     davem@...emloft.net, netdev@...r.kernel.org
Cc:     Ioana Ciornei <ioana.ciornei@....com>
Subject: [PATCH net-next 2/5] dpaa2-eth: check the result of skb_to_sgvec()

Before passing the result of skb_to_sgvec() to dma_map_sg() check if any
error was returned.

Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>
---
 drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
index f150cd454fa4..db27f959d409 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -611,6 +611,10 @@ static int build_sg_fd(struct dpaa2_eth_priv *priv,
 
 	sg_init_table(scl, nr_frags + 1);
 	num_sg = skb_to_sgvec(skb, scl, 0, skb->len);
+	if (unlikely(num_sg < 0)) {
+		err = -ENOMEM;
+		goto dma_map_sg_failed;
+	}
 	num_dma_bufs = dma_map_sg(dev, scl, num_sg, DMA_BIDIRECTIONAL);
 	if (unlikely(!num_dma_bufs)) {
 		err = -ENOMEM;
-- 
2.25.1