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From:   Sasha Levin <sashal@kernel.org>
To:     stable@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     Govindarajulu Varadarajan <gvaradar@cisco.com>,
        "David S . Miller" <davem@davemloft.net>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 4.9 89/98] enic: do not overwrite error code
Date:   Thu, 25 Oct 2018 10:14:14 -0400
Message-Id: <20181025141423.213774-89-sashal@kernel.org>
In-Reply-To: <20181025141423.213774-1-sashal@kernel.org>
References: <20181025141423.213774-1-sashal@kernel.org>
Sender: linux-kernel-owner@vger.kernel.org
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From: Govindarajulu Varadarajan <gvaradar@cisco.com>

[ Upstream commit 56f772279a762984f6e9ebbf24a7c829faba5712 ]

In failure path, we overwrite err to what vnic_rq_disable() returns. In
case it returns 0, enic_open() returns success in case of error.

Reported-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Fixes: e8588e268509 ("enic: enable rq before updating rq descriptors")
Signed-off-by: Govindarajulu Varadarajan <gvaradar@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/cisco/enic/enic_main.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index f314be07ec58..07282eb76867 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -1708,7 +1708,7 @@ static int enic_open(struct net_device *netdev)
 {
 	struct enic *enic = netdev_priv(netdev);
 	unsigned int i;
-	int err;
+	int err, ret;
 
 	err = enic_request_intr(enic);
 	if (err) {
@@ -1766,10 +1766,9 @@ static int enic_open(struct net_device *netdev)
 
 err_out_free_rq:
 	for (i = 0; i < enic->rq_count; i++) {
-		err = vnic_rq_disable(&enic->rq[i]);
-		if (err)
-			return err;
-		vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
+		ret = vnic_rq_disable(&enic->rq[i]);
+		if (!ret)
+			vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
 	}
 	enic_dev_notify_unset(enic);
 err_out_free_intr:
-- 
2.17.1