[PATCH] dsa: fix returnvar.cocci warnings

[kernel test robot <lkp@intel.com>]

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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Alexander Lobakin <alobakin@pm.me>
CC: Vladimir Oltean <olteanv@gmail.com>
CC: Florian Fainelli <f.fainelli@gmail.com>
CC: Woojung Huh <woojung.huh@microchip.com>
CC: UNGLinuxDriver(a)microchip.com
CC: Andrew Lunn <andrew@lunn.ch>
CC: Vivien Didelot <vivien.didelot@gmail.com>
CC: Jakub Kicinski <kuba@kernel.org>
CC: netdev(a)vger.kernel.org
CC: linux-kernel(a)vger.kernel.org

From: kernel test robot <lkp@intel.com>

drivers/net/dsa/microchip/ksz_common.c:298:5-8: Unneeded variable: "ret". Return "0" on line 320


 Remove unneeded variable used to store return value.

Generated by: scripts/coccinelle/misc/returnvar.cocci

CC: Alexander Lobakin <alobakin@pm.me>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
---

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   de5540965853e514a85d3b775e9049deb85a2ff3
commit: 227d72063fccb2d19b30fb4197fba478514f7d83 dsa: simplify Kconfig symbols and dependencies
:::::: branch date: 15 hours ago
:::::: commit date: 4 months ago

 ksz_common.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -295,7 +295,6 @@ int ksz_port_mdb_del(struct dsa_switch *
 	struct ksz_device *dev = ds->priv;
 	struct alu_struct alu;
 	int index;
-	int ret = 0;
 
 	for (index = 0; index < dev->num_statics; index++) {
 		if (!dev->dev_ops->r_sta_mac_table(dev, index, &alu)) {
@@ -317,7 +316,7 @@ int ksz_port_mdb_del(struct dsa_switch *
 	dev->dev_ops->w_sta_mac_table(dev, index, &alu);
 
 exit:
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(ksz_port_mdb_del);