[PATCH] unlock 12c_mutex before return

[Roel Kluin <12o3l@tiscali.nl>]

    unlock 12c_mutex before return -EINVAL
    
    Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
---
diff --git a/drivers/media/dvb/dvb-usb/au6610.c b/drivers/media/dvb/dvb-usb/au6610.c
index 18e0b16..31f47c7 100644
--- a/drivers/media/dvb/dvb-usb/au6610.c
+++ b/drivers/media/dvb/dvb-usb/au6610.c
@@ -82,8 +82,10 @@ static int au6610_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
 	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
 		return -EAGAIN;
 
-	if (num > 2)
+	if (num > 2) {
+                mutex_unlock(&d->i2c_mutex);
 		return -EINVAL;
+	}
 
 	for (i = 0; i < num; i++) {
 		/* write/read request */
-
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