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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>,
        Vivien Didelot <vivien.didelot@gmail.com>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Vladimir Oltean <olteanv@gmail.com>,
        Lars Povlsen <lars.povlsen@microchip.com>,
        Steen Hegelund <Steen.Hegelund@microchip.com>,
        UNGLinuxDriver@microchip.com, Ariel Elior <aelior@marvell.com>,
        Manish Chopra <manishc@marvell.com>,
        Edward Cree <ecree.xilinx@gmail.com>,
        Martin Habets <habetsm.xilinx@gmail.com>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Jiri Pirko <jiri@resnulli.us>,
        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Andrii Nakryiko <andrii@kernel.org>,
        Martin KaFai Lau <kafai@fb.com>,
        Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
        John Fastabend <john.fastabend@gmail.com>,
        KP Singh <kpsingh@kernel.org>,
        Casper Andersson <casper.casan@gmail.com>,
        Jakob Koschel <jakobkoschel@gmail.com>,
        Colin Ian King <colin.king@intel.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Michael Walle <michael@walle.cc>,
        Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
        Eric Dumazet <edumazet@google.com>,
        Xu Wang <vulab@iscas.ac.cn>, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linuxppc-dev@lists.ozlabs.org, bpf@vger.kernel.org,
        Mike Rapoport <rppt@kernel.org>,
        "Brian Johannesmeyer" <bjohannesmeyer@gmail.com>,
        Cristiano Giuffrida <c.giuffrida@vu.nl>,
        "Bos, H.J." <h.j.bos@vu.nl>
Subject: [PATCH net-next v2 01/18] connector: Replace usage of found with dedicated list iterator variable
Date:   Tue, 12 Apr 2022 12:58:13 +0200
Message-Id: <20220412105830.3495846-2-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>
---
 drivers/connector/cn_queue.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/connector/cn_queue.c b/drivers/connector/cn_queue.c
index 996f025eb63c..ed77599b0b25 100644
--- a/drivers/connector/cn_queue.c
+++ b/drivers/connector/cn_queue.c
@@ -92,20 +92,19 @@ int cn_queue_add_callback(struct cn_queue_dev *dev, const char *name,
 
 void cn_queue_del_callback(struct cn_queue_dev *dev, const struct cb_id *id)
 {
-	struct cn_callback_entry *cbq, *n;
-	int found = 0;
+	struct cn_callback_entry *cbq = NULL, *iter, *n;
 
 	spin_lock_bh(&dev->queue_lock);
-	list_for_each_entry_safe(cbq, n, &dev->queue_list, callback_entry) {
-		if (cn_cb_equal(&cbq->id.id, id)) {
-			list_del(&cbq->callback_entry);
-			found = 1;
+	list_for_each_entry_safe(iter, n, &dev->queue_list, callback_entry) {
+		if (cn_cb_equal(&iter->id.id, id)) {
+			list_del(&iter->callback_entry);
+			cbq = iter;
 			break;
 		}
 	}
 	spin_unlock_bh(&dev->queue_lock);
 
-	if (found)
+	if (cbq)
 		cn_queue_release_callback(cbq);
 }
 
-- 
2.25.1