netdev - [PATCH net] net: dsa: microchip: initialize mutex before use

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Message-ID: <1540943149-26832-1-git-send-email-Tristram.Ha@microchip.com>
Date:   Tue, 30 Oct 2018 16:45:49 -0700
From:   <Tristram.Ha@...rochip.com>
To:     "David S. Miller" <davem@...emloft.net>
CC:     Tristram Ha <Tristram.Ha@...rochip.com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Pavel Machek <pavel@....cz>, <UNGLinuxDriver@...rochip.com>,
        <netdev@...r.kernel.org>
Subject: [PATCH net] net: dsa: microchip: initialize mutex before use

From: Tristram Ha <Tristram.Ha@...rochip.com>

Initialize mutex before use.  Avoid kernel complaint when
CONFIG_DEBUG_LOCK_ALLOC is enabled.

Fixes: b987e98e50ab90e5 ("dsa: add DSA switch driver for Microchip KSZ9477")
Signed-off-by: Tristram Ha <Tristram.Ha@...rochip.com>
---
 drivers/net/dsa/microchip/ksz_common.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 54e0ca6..f6f0662 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -1117,11 +1117,6 @@ static int ksz_switch_init(struct ksz_device *dev)
 {
 	int i;
 
-	mutex_init(&dev->reg_mutex);
-	mutex_init(&dev->stats_mutex);
-	mutex_init(&dev->alu_mutex);
-	mutex_init(&dev->vlan_mutex);
-
 	dev->ds->ops = &ksz_switch_ops;
 
 	for (i = 0; i < ARRAY_SIZE(ksz_switch_chips); i++) {
@@ -1206,6 +1201,12 @@ int ksz_switch_register(struct ksz_device *dev)
 	if (dev->pdata)
 		dev->chip_id = dev->pdata->chip_id;
 
+	/* mutex is used in next function call. */
+	mutex_init(&dev->reg_mutex);
+	mutex_init(&dev->stats_mutex);
+	mutex_init(&dev->alu_mutex);
+	mutex_init(&dev->vlan_mutex);
+
 	if (ksz_switch_detect(dev))
 		return -EINVAL;
 
-- 
1.9.1