From a7cc9c9d8cbb31ae97e00dca89a593e0e93144a2 Mon Sep 17 00:00:00 2001 From: Pavel Belous Date: Fri, 14 Feb 2020 18:44:56 +0300 Subject: [PATCH] net: atlantic: fix potential error handling Code inspection found that in case of mapping error we do return current 'ret' value. But beside error, it is used to count number of descriptors allocated for the packet. In that case map_skb function could return '1'. Changing it to return zero (number of mapped descriptors for skb) Fixes: 3bc2c65a1162 ("net: ethernet: aquantia: Add ring support code") Signed-off-by: Pavel Belous Signed-off-by: Igor Russkikh Signed-off-by: Dmitry Bogdanov Signed-off-by: David S. Miller --- drivers/net/ethernet/aquantia/atlantic/aq_nic.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c index 263beea1859c1..e95f6a6bef733 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c @@ -533,8 +533,10 @@ unsigned int aq_nic_map_skb(struct aq_nic_s *self, struct sk_buff *skb, dx_buff->len, DMA_TO_DEVICE); - if (unlikely(dma_mapping_error(aq_nic_get_dev(self), dx_buff->pa))) + if (unlikely(dma_mapping_error(aq_nic_get_dev(self), dx_buff->pa))) { + ret = 0; goto exit; + } first = dx_buff; dx_buff->len_pkt = skb->len; -- 2.39.5