[PATCH] wifi: mt76: Fix coverity issue for dma init

[Eason Lai]

From: Jeff Hsu <Jeff.Hsu at mediatek.com>

Check the snprintf return value writing napi_dev->name
free both netdevs and return -EINVAL when < 0

Signed-off-by: Jeff Hsu <Jeff.Hsu at mediatek.com>
---
 drivers/net/wireless/mediatek/mt76/dma.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c
index a67880a9281c..2c5d67a5bb81 100644
--- a/drivers/net/wireless/mediatek/mt76/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/dma.c
@@ -1157,8 +1157,12 @@ mt76_dma_init(struct mt76_dev *dev,
 	priv = netdev_priv(dev->tx_napi_dev);
 	*priv = dev;
 
-	snprintf(dev->napi_dev->name, sizeof(dev->napi_dev->name), "%s",
-		 wiphy_name(dev->hw->wiphy));
+	if (snprintf(dev->napi_dev->name, sizeof(dev->napi_dev->name), "%s",
+		     wiphy_name(dev->hw->wiphy)) < 0) {
+		free_netdev(dev->tx_napi_dev);
+		free_netdev(dev->napi_dev);
+		return -EINVAL;
+	}
 	dev->napi_dev->threaded = 1;
 	init_completion(&dev->mmio.wed_reset);
 	init_completion(&dev->mmio.wed_reset_complete);
-- 
2.45.2