net: dsa: microchip: initialize mutex before use

[ Upstream commit 284fb78ed7572117846f8e1d1d8e3dbfd16880c2 ]

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@microchip.com>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 56cd6d365352e2b00d20f80434fed301449ec53d..6f4c9913f8f51bafb241a5650ec055c5bacd159e 100644 (file)
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -1104,11 +1104,6 @@ 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++) {
@@ -1193,6 +1188,11 @@ int ksz_switch_register(struct ksz_device *dev)
        if (dev->pdata)
                dev->chip_id = dev->pdata->chip_id;
 
+       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;