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[24.205.208.113]) by smtp.gmail.com with ESMTPSA id g7-20020a376b07000000b006492f19ae76sm3908647qkc.27.2022.03.05.09.14.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Mar 2022 09:14:53 -0800 (PST) From: trix@redhat.com To: andrew@lunn.ch, vivien.didelot@gmail.com, f.fainelli@gmail.com, olteanv@gmail.com, davem@davemloft.net, kuba@kernel.org, nathan@kernel.org, ndesaulniers@google.com Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, Tom Rix Subject: [PATCH] net: dsa: return success if there was nothing to do Date: Sat, 5 Mar 2022 09:14:48 -0800 Message-Id: <20220305171448.692839-1-trix@redhat.com> X-Mailer: git-send-email 2.26.3 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Tom Rix Clang static analysis reports this representative issue dsa.c:486:2: warning: Undefined or garbage value returned to caller return err; ^~~~~~~~~~ err is only set in the loop. If the loop is empty, garbage will be returned. So initialize err to 0 to handle this noop case. Signed-off-by: Tom Rix Reviewed-by: Andrew Lunn Reviewed-by: Vladimir Oltean --- net/dsa/dsa.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c index 06d5de28a43ea..fe971a2c15cd1 100644 --- a/net/dsa/dsa.c +++ b/net/dsa/dsa.c @@ -471,7 +471,7 @@ int dsa_port_walk_fdbs(struct dsa_switch *ds, int port,= dsa_fdb_walk_cb_t cb) { struct dsa_port *dp =3D dsa_to_port(ds, port); struct dsa_mac_addr *a; - int err; + int err =3D 0; =20 mutex_lock(&dp->addr_lists_lock); =20 @@ -491,7 +491,7 @@ int dsa_port_walk_mdbs(struct dsa_switch *ds, int port,= dsa_fdb_walk_cb_t cb) { struct dsa_port *dp =3D dsa_to_port(ds, port); struct dsa_mac_addr *a; - int err; + int err =3D 0; =20 mutex_lock(&dp->addr_lists_lock); =20 --=20 2.26.3