linux-kernel - [PATCH v1 19/26] net: dsa: microchip: ksz8_r_dyn_mac_table(): use entries variable to signal 0 entries

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Message-Id: <20221128120034.4075562-20-o.rempel@pengutronix.de>
Date:   Mon, 28 Nov 2022 13:00:27 +0100
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Woojung Huh <woojung.huh@...rochip.com>,
        UNGLinuxDriver@...rochip.com, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     Oleksij Rempel <o.rempel@...gutronix.de>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        Arun.Ramadoss@...rochip.com
Subject: [PATCH v1 19/26] net: dsa: microchip: ksz8_r_dyn_mac_table(): use entries variable to signal 0 entries

We already have a variable to provide number of entries. So use it,
instead of using error number.

Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
---
 drivers/net/dsa/microchip/ksz8795.c | 24 +++++++-----------------
 1 file changed, 7 insertions(+), 17 deletions(-)

diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c
index 3348f5c25942..31c77e086a9d 100644
--- a/drivers/net/dsa/microchip/ksz8795.c
+++ b/drivers/net/dsa/microchip/ksz8795.c
@@ -385,19 +385,11 @@ static int ksz8_valid_dyn_entry(struct ksz_device *dev, u8 *data)
 	} while ((*data & masks[DYNAMIC_MAC_TABLE_NOT_READY]) && timeout);
 
 	/* Entry is not ready for accessing. */
-	if (*data & masks[DYNAMIC_MAC_TABLE_NOT_READY]) {
+	if (*data & masks[DYNAMIC_MAC_TABLE_NOT_READY])
 		return -ETIMEDOUT;
-	/* Entry is ready for accessing. */
-	} else {
-		ret = ksz_read8(dev, regs[REG_IND_DATA_8], data);
-		if (ret)
-			return ret;
 
-		/* There is no valid entry in the table. */
-		if (*data & masks[DYNAMIC_MAC_TABLE_MAC_EMPTY])
-			return -ENXIO;
-	}
-	return 0;
+	/* Entry is ready for accessing. */
+	return ksz_read8(dev, regs[REG_IND_DATA_8], data);
 }
 
 static int ksz8_r_dyn_mac_table(struct ksz_device *dev, u16 addr, u8 *mac_addr,
@@ -425,13 +417,13 @@ static int ksz8_r_dyn_mac_table(struct ksz_device *dev, u16 addr, u8 *mac_addr,
 		goto unlock_alu;
 
 	ret = ksz8_valid_dyn_entry(dev, &data);
-	if (ret == -ENXIO) {
-		*entries = 0;
+	if (ret)
 		goto unlock_alu;
-	}
 
-	if (ret)
+	if (data & masks[DYNAMIC_MAC_TABLE_MAC_EMPTY]) {
+		*entries = 0;
 		goto unlock_alu;
+	}
 
 	ret = ksz_read64(dev, regs[REG_IND_DATA_HI], &buf);
 	if (ret)
@@ -997,8 +989,6 @@ int ksz8_fdb_dump(struct ksz_device *dev, int port,
 		u8 src_port;
 
 		ret = ksz8_r_dyn_mac_table(dev, i, mac, &src_port, &entries);
-		if (ret == -ENXIO)
-			return 0;
 		if (ret)
 			return ret;
 
-- 
2.30.2