--- zzzz-none-000/linux-3.10.107/drivers/net/wireless/ath/carl9170/usb.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/net/wireless/ath/carl9170/usb.c	2021-02-04 17:41:59.000000000 +0000
@@ -651,6 +651,7 @@
 	unsigned int plen, void *payload, unsigned int outlen, void *out)
 {
 	int err = -ENOMEM;
+	unsigned long time_left;
 
 	if (!IS_ACCEPTING_CMD(ar))
 		return -EIO;
@@ -672,8 +673,8 @@
 	err = __carl9170_exec_cmd(ar, &ar->cmd, false);
 
 	if (!(cmd & CARL9170_CMD_ASYNC_FLAG)) {
-		err = wait_for_completion_timeout(&ar->cmd_wait, HZ);
-		if (err == 0) {
+		time_left = wait_for_completion_timeout(&ar->cmd_wait, HZ);
+		if (time_left == 0) {
 			err = -ETIMEDOUT;
 			goto err_unbuf;
 		}
@@ -780,7 +781,7 @@
 	complete_all(&ar->cmd_wait);
 
 	/* This is required to prevent an early completion on _start */
-	INIT_COMPLETION(ar->cmd_wait);
+	reinit_completion(&ar->cmd_wait);
 
 	/*
 	 * Note:
@@ -1099,8 +1100,14 @@
 
 	carl9170_set_state(ar, CARL9170_STOPPED);
 
-	return request_firmware_nowait(THIS_MODULE, 1, CARL9170FW_NAME,
+	err = request_firmware_nowait(THIS_MODULE, 1, CARL9170FW_NAME,
 		&ar->udev->dev, GFP_KERNEL, ar, carl9170_usb_firmware_step2);
+	if (err) {
+		usb_put_dev(udev);
+		usb_put_dev(udev);
+		carl9170_free(ar);
+	}
+	return err;
 }
 
 static void carl9170_usb_disconnect(struct usb_interface *intf)