[PATCH -next] [media] rainshadow-cec: Fix missing spin_lock_init()

[Wei Yongjun]

From: Wei Yongjun <weiyongj...@huawei.com>

The driver allocates the spinlock but not initialize it.
Use spin_lock_init() on it to initialize it correctly.

This is detected by Coccinelle semantic patch.

Fixes: 0f314f6c2e77 ("[media] rainshadow-cec: new RainShadow Tech HDMI
CEC driver")
Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
---
 drivers/media/usb/rainshadow-cec/rainshadow-cec.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/usb/rainshadow-cec/rainshadow-cec.c 
b/drivers/media/usb/rainshadow-cec/rainshadow-cec.c
index 541ca54..8f562ed 100644
--- a/drivers/media/usb/rainshadow-cec/rainshadow-cec.c
+++ b/drivers/media/usb/rainshadow-cec/rainshadow-cec.c
@@ -336,6 +336,7 @@ static int rain_connect(struct serio *serio, struct 
serio_driver *drv)
        serio_set_drvdata(serio, rain);
        INIT_WORK(&rain->work, rain_irq_work_handler);
        mutex_init(&rain->write_lock);
+       spin_lock_init(&rain->buf_lock);
 
        err = serio_open(serio, drv);
        if (err)