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From:   Jakob Koschel <jakobkoschel@gmail.com>
To:     "David S. Miller" <davem@davemloft.net>
Cc:     Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
        Andrew Lunn <andrew@lunn.ch>,
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        John Fastabend <john.fastabend@gmail.com>,
        KP Singh <kpsingh@kernel.org>,
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        Jakob Koschel <jakobkoschel@gmail.com>,
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        Mike Rapoport <rppt@kernel.org>,
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        Cristiano Giuffrida <c.giuffrida@vu.nl>,
        "Bos, H.J." <h.j.bos@vu.nl>
Subject: [PATCH net-next v2 07/18] net: dsa: Replace usage of found with dedicated list iterator variable
Date:   Tue, 12 Apr 2022 12:58:19 +0200
Message-Id: <20220412105830.3495846-8-jakobkoschel@gmail.com>
In-Reply-To: <20220412105830.3495846-1-jakobkoschel@gmail.com>
References: <20220412105830.3495846-1-jakobkoschel@gmail.com>
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To move the list iterator variable into the list_for_each_entry_*()
macro in the future it should be avoided to use the list iterator
variable after the loop body.

To *never* use the list iterator variable after the loop it was
concluded to use a separate iterator variable instead of a
found boolean [1].

This removes the need to use a found variable and simply checking if
the variable was set, can determine if the break/goto was hit.

Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/ [1]
Signed-off-by: Jakob Koschel <jakobkoschel@gmail.com>
---
 net/dsa/dsa.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 89c6c86e746f..645522c4dd4a 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -112,22 +112,21 @@ const struct dsa_device_ops *dsa_find_tagger_by_name(const char *buf)
 
 const struct dsa_device_ops *dsa_tag_driver_get(int tag_protocol)
 {
-	struct dsa_tag_driver *dsa_tag_driver;
+	struct dsa_tag_driver *dsa_tag_driver = NULL, *iter;
 	const struct dsa_device_ops *ops;
-	bool found = false;
 
 	request_module("%s%d", DSA_TAG_DRIVER_ALIAS, tag_protocol);
 
 	mutex_lock(&dsa_tag_drivers_lock);
-	list_for_each_entry(dsa_tag_driver, &dsa_tag_drivers_list, list) {
-		ops = dsa_tag_driver->ops;
+	list_for_each_entry(iter, &dsa_tag_drivers_list, list) {
+		ops = iter->ops;
 		if (ops->proto == tag_protocol) {
-			found = true;
+			dsa_tag_driver = iter;
 			break;
 		}
 	}
 
-	if (found) {
+	if (dsa_tag_driver) {
 		if (!try_module_get(dsa_tag_driver->owner))
 			ops = ERR_PTR(-ENOPROTOOPT);
 	} else {
-- 
2.25.1