[PATCH] counter: rz-mtu3-cnt: Unlock on error in rz_mtu3_count_write()

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

The return -ERANGE error paths need to call mutex_unlock(&priv->lock);
before returning.

Fixes: 25d21447d896 ("counter: Add Renesas RZ/G2L MTU3a counter driver")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
 drivers/counter/rz-mtu3-cnt.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/counter/rz-mtu3-cnt.c b/drivers/counter/rz-mtu3-cnt.c
index a371bab68499..aeadce5e2853 100644
--- a/drivers/counter/rz-mtu3-cnt.c
+++ b/drivers/counter/rz-mtu3-cnt.c
@@ -358,19 +358,23 @@ static int rz_mtu3_count_ceiling_write(struct counter_device *counter,
 	switch (count->id) {
 	case RZ_MTU3_16_BIT_MTU1_CH:
 	case RZ_MTU3_16_BIT_MTU2_CH:
-		if (ceiling > U16_MAX)
-			return -ERANGE;
+		if (ceiling > U16_MAX) {
+			ret = -ERANGE;
+			goto unlock;
+		}
 		priv->mtu_16bit_max[ch_id] = ceiling;
 		break;
 	case RZ_MTU3_32_BIT_CH:
-		if (ceiling > U32_MAX)
-			return -ERANGE;
+		if (ceiling > U32_MAX) {
+			ret = -ERANGE;
+			goto unlock;
+		}
 		priv->mtu_32bit_max = ceiling;
 		break;
 	default:
 		/* should never reach this path */
-		mutex_unlock(&priv->lock);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto unlock;
 	}
 
 	pm_runtime_get_sync(ch->dev);
@@ -381,9 +385,9 @@ static int rz_mtu3_count_ceiling_write(struct counter_device *counter,
 
 	rz_mtu3_8bit_ch_write(ch, RZ_MTU3_TCR, RZ_MTU3_TCR_CCLR_TGRA);
 	pm_runtime_put(ch->dev);
+unlock:
 	mutex_unlock(&priv->lock);
-
-	return 0;
+	return ret;
 }
 
 static void rz_mtu3_32bit_cnt_setting(struct counter_device *counter)
-- 
2.39.2