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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>,
        Bjarni Jonasson <bjarni.jonasson@microchip.com>,
        Jakob Koschel <jakobkoschel@gmail.com>,
        Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
        Arnd Bergmann <arnd@arndb.de>,
        Colin Ian King <colin.king@intel.com>,
        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 v4 08/18] net: sparx5: Replace usage of found with dedicated list iterator variable
Date:   Fri, 15 Apr 2022 14:29:37 +0200
Message-Id: <20220415122947.2754662-9-jakobkoschel@gmail.com>
In-Reply-To: <20220415122947.2754662-1-jakobkoschel@gmail.com>
References: <20220415122947.2754662-1-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>
---
 .../microchip/sparx5/sparx5_mactable.c        | 25 +++++++++----------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_mactable.c b/drivers/net/ethernet/microchip/sparx5/sparx5_mactable.c
index a5837dbe0c7e..bb8d9ce79ac2 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_mactable.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_mactable.c
@@ -362,8 +362,7 @@ static void sparx5_mact_handle_entry(struct sparx5 *sparx5,
 				     unsigned char mac[ETH_ALEN],
 				     u16 vid, u32 cfg2)
 {
-	struct sparx5_mact_entry *mact_entry;
-	bool found = false;
+	struct sparx5_mact_entry *mact_entry = NULL, *iter;
 	u16 port;
 
 	if (LRN_MAC_ACCESS_CFG_2_MAC_ENTRY_ADDR_TYPE_GET(cfg2) !=
@@ -378,28 +377,28 @@ static void sparx5_mact_handle_entry(struct sparx5 *sparx5,
 		return;
 
 	mutex_lock(&sparx5->mact_lock);
-	list_for_each_entry(mact_entry, &sparx5->mact_entries, list) {
-		if (mact_entry->vid == vid &&
-		    ether_addr_equal(mac, mact_entry->mac)) {
-			found = true;
-			mact_entry->flags |= MAC_ENT_ALIVE;
-			if (mact_entry->port != port) {
+	list_for_each_entry(iter, &sparx5->mact_entries, list) {
+		if (iter->vid == vid &&
+		    ether_addr_equal(mac, iter->mac)) {
+			iter->flags |= MAC_ENT_ALIVE;
+			if (iter->port != port) {
 				dev_warn(sparx5->dev, "Entry move: %d -> %d\n",
-					 mact_entry->port, port);
-				mact_entry->port = port;
-				mact_entry->flags |= MAC_ENT_MOVED;
+					 iter->port, port);
+				iter->port = port;
+				iter->flags |= MAC_ENT_MOVED;
 			}
 			/* Entry handled */
+			mact_entry = iter;
 			break;
 		}
 	}
 	mutex_unlock(&sparx5->mact_lock);
 
-	if (found && !(mact_entry->flags & MAC_ENT_MOVED))
+	if (mact_entry && !(mact_entry->flags & MAC_ENT_MOVED))
 		/* Present, not moved */
 		return;
 
-	if (!found) {
+	if (!mact_entry) {
 		/* Entry not found - now add */
 		mact_entry = alloc_mact_entry(sparx5, mac, vid, port);
 		if (!mact_entry)
-- 
2.25.1