linux-kernel - [PATCH] net: tap: remove redundant assignments

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Message-Id: <20210222145748.10496-1-tangbin@cmss.chinamobile.com>
Date:   Mon, 22 Feb 2021 22:57:48 +0800
From:   Tang Bin <tangbin@...s.chinamobile.com>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Tang Bin <tangbin@...s.chinamobile.com>
Subject: [PATCH] net: tap: remove redundant assignments

In the function tap_get_user, the assignment of 'err' at both places
is redundant, so remove one.

Signed-off-by: Tang Bin <tangbin@...s.chinamobile.com>
---
 drivers/net/tap.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/tap.c b/drivers/net/tap.c
index 1f4bdd944..3e9c72738 100644
--- a/drivers/net/tap.c
+++ b/drivers/net/tap.c
@@ -625,7 +625,7 @@ static ssize_t tap_get_user(struct tap_queue *q, void *msg_control,
 	struct tap_dev *tap;
 	unsigned long total_len = iov_iter_count(from);
 	unsigned long len = total_len;
-	int err;
+	int err = -EINVAL;
 	struct virtio_net_hdr vnet_hdr = { 0 };
 	int vnet_hdr_len = 0;
 	int copylen = 0;
@@ -636,7 +636,6 @@ static ssize_t tap_get_user(struct tap_queue *q, void *msg_control,
 	if (q->flags & IFF_VNET_HDR) {
 		vnet_hdr_len = READ_ONCE(q->vnet_hdr_sz);
 
-		err = -EINVAL;
 		if (len < vnet_hdr_len)
 			goto err;
 		len -= vnet_hdr_len;
@@ -657,7 +656,6 @@ static ssize_t tap_get_user(struct tap_queue *q, void *msg_control,
 			goto err;
 	}
 
-	err = -EINVAL;
 	if (unlikely(len < ETH_HLEN))
 		goto err;
 
-- 
2.20.1.windows.1