diff --git a/drivers/net/wwan/mhi_wwan_mbim.c b/drivers/net/wwan/mhi_wwan_mbim.c
index f37232fb29c0..377529bbf124 100644
--- a/drivers/net/wwan/mhi_wwan_mbim.c
+++ b/drivers/net/wwan/mhi_wwan_mbim.c
@@ -601,6 +601,7 @@ static int mhi_mbim_probe(struct mhi_device *mhi_dev, const struct mhi_device_id
 	if (!mbim)
 		return -ENOMEM;
 
+	spin_lock_init(&mbim->tx_lock);
 	dev_set_drvdata(&mhi_dev->dev, mbim);
 	mbim->mdev = mhi_dev;
 	mbim->mru = mhi_dev->mhi_cntrl->mru ? mhi_dev->mhi_cntrl->mru : MHI_DEFAULT_MRU;