HID: i2c-hid: Fold i2c_hid_execute_reset() into i2c_hid_hwreset()

i2c_hid_hwreset() is the only caller of i2c_hid_execute_reset(),
fold the latter into the former.

This is a preparation patch for removing the need for
I2C_HID_QUIRK_NO_IRQ_AFTER_RESET by making i2c-hid behave
more like Windows.

No functional changes intended.
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

drivers/hid/i2c-hid/i2c-hid-core.c

@@ -426,12 +426,23 @@ static int i2c_hid_set_power(struct i2c_hid *ihid, int power_state)
 	return ret;
 }
 
-static int i2c_hid_execute_reset(struct i2c_hid *ihid)
+static int i2c_hid_hwreset(struct i2c_hid *ihid)
 {
 	size_t length = 0;
 	int ret;
 
-	i2c_hid_dbg(ihid, "resetting...\n");
+	i2c_hid_dbg(ihid, "%s\n", __func__);
+
+	/*
+	 * This prevents sending feature reports while the device is
+	 * being reset. Otherwise we may lose the reset complete
+	 * interrupt.
+	 */
+	mutex_lock(&ihid->reset_lock);
+
+	ret = i2c_hid_set_power(ihid, I2C_HID_PWR_ON);
+	if (ret)
+		goto err_unlock;
 
 	/* Prepare reset command. Command register goes first. */
 	*(__le16 *)ihid->cmdbuf = ihid->hdesc.wCommandRegister;
@@ -444,59 +455,35 @@ static int i2c_hid_execute_reset(struct i2c_hid *ihid)
 
 	ret = i2c_hid_xfer(ihid, ihid->cmdbuf, length, NULL, 0);
 	if (ret) {
-		dev_err(&ihid->client->dev, "failed to reset device.\n");
-		goto out;
+		dev_err(&ihid->client->dev,
+			"failed to reset device: %d\n", ret);
+		goto err_clear_reset;
 	}
 
+	i2c_hid_dbg(ihid, "%s: waiting...\n", __func__);
+
 	if (ihid->quirks & I2C_HID_QUIRK_NO_IRQ_AFTER_RESET) {
 		msleep(100);
-		goto out;
-	}
-
-	i2c_hid_dbg(ihid, "%s: waiting...\n", __func__);
-	if (!wait_event_timeout(ihid->wait,
-				!test_bit(I2C_HID_RESET_PENDING, &ihid->flags),
-				msecs_to_jiffies(5000))) {
+		clear_bit(I2C_HID_RESET_PENDING, &ihid->flags);
+	} else if (!wait_event_timeout(ihid->wait,
+				       !test_bit(I2C_HID_RESET_PENDING, &ihid->flags),
+				       msecs_to_jiffies(5000))) {
 		ret = -ENODATA;
-		goto out;
+		goto err_clear_reset;
 	}
 	i2c_hid_dbg(ihid, "%s: finished.\n", __func__);
 
-out:
-	clear_bit(I2C_HID_RESET_PENDING, &ihid->flags);
-	return ret;
-}
-
-static int i2c_hid_hwreset(struct i2c_hid *ihid)
-{
-	int ret;
-
-	i2c_hid_dbg(ihid, "%s\n", __func__);
-
-	/*
-	 * This prevents sending feature reports while the device is
-	 * being reset. Otherwise we may lose the reset complete
-	 * interrupt.
-	 */
-	mutex_lock(&ihid->reset_lock);
-
-	ret = i2c_hid_set_power(ihid, I2C_HID_PWR_ON);
-	if (ret)
-		goto out_unlock;
-
-	ret = i2c_hid_execute_reset(ihid);
-	if (ret) {
-		dev_err(&ihid->client->dev,
-			"failed to reset device: %d\n", ret);
-		i2c_hid_set_power(ihid, I2C_HID_PWR_SLEEP);
-		goto out_unlock;
-	}
-
 	/* At least some SIS devices need this after reset */
 	if (!(ihid->quirks & I2C_HID_QUIRK_NO_WAKEUP_AFTER_RESET))
 		ret = i2c_hid_set_power(ihid, I2C_HID_PWR_ON);
 
-out_unlock:
+	mutex_unlock(&ihid->reset_lock);
+	return ret;
+
+err_clear_reset:
+	clear_bit(I2C_HID_RESET_PENDING, &ihid->flags);
+	i2c_hid_set_power(ihid, I2C_HID_PWR_SLEEP);
+err_unlock:
 	mutex_unlock(&ihid->reset_lock);
 	return ret;
 }