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

[Tristram.Ha]

From: Tristram Ha <tristram...@microchip.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...@microchip.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