From 8b867ae028b40325bdb866a40b149ad28da43852 Mon Sep 17 00:00:00 2001
From: Pavel Belous <pbelous@marvell.com>
Date: Fri, 14 Feb 2020 18:44:56 +0300
Subject: [PATCH 09/16] net: atlantic: fix potential error handling
Git-commit: 380ec5b9af7f0d57dbf6ac067fd9f33cff2fef71
Patch-mainline: v5.6-rc3
References: git-fixes
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: 018423e90bee ("net: ethernet: aquantia: Add ring support code")
Signed-off-by: Pavel Belous <pbelous@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: Dmitry Bogdanov <dbogdanov@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Denis Kirjanov <denis.kirjanov@suse.com>
---
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 d46f7ba3ec8c..b3f742723de3 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -504,8 +504,10 @@ static unsigned int aq_nic_map_skb(struct aq_nic_s *self,
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;
+ }
dx_buff->len_pkt = skb->len;
dx_buff->is_sop = 1U;
--
2.16.4