--- zzzz-none-000/linux-3.10.107/drivers/net/irda/stir4200.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/net/irda/stir4200.c	2021-02-04 17:41:59.000000000 +0000
@@ -40,8 +40,8 @@
 #include <linux/moduleparam.h>
 
 #include <linux/kernel.h>
+#include <linux/ktime.h>
 #include <linux/types.h>
-#include <linux/init.h>
 #include <linux/time.h>
 #include <linux/skbuff.h>
 #include <linux/netdevice.h>
@@ -175,7 +175,7 @@
 	__u8		  *fifo_status;
 
 	iobuff_t  	  rx_buff;	/* receive unwrap state machine */
-	struct timeval	  rx_time;
+	ktime_t		rx_time;
 	int		  receiving;
 	struct urb	 *rx_urb;
 };
@@ -651,15 +651,12 @@
 static void turnaround_delay(const struct stir_cb *stir, long us)
 {
 	long ticks;
-	struct timeval now;
 
 	if (us <= 0)
 		return;
 
-	do_gettimeofday(&now);
-	if (now.tv_sec - stir->rx_time.tv_sec > 0)
-		us -= USEC_PER_SEC;
-	us -= now.tv_usec - stir->rx_time.tv_usec;
+	us -= ktime_us_delta(ktime_get(), stir->rx_time);
+
 	if (us < 10)
 		return;
 
@@ -824,8 +821,8 @@
 		pr_debug("receive %d\n", urb->actual_length);
 		unwrap_chars(stir, urb->transfer_buffer,
 			     urb->actual_length);
-		
-		do_gettimeofday(&stir->rx_time);
+
+		stir->rx_time = ktime_get();
 	}
 
 	/* kernel thread is stopping receiver don't resubmit */
@@ -877,7 +874,7 @@
 
 	skb_reserve(stir->rx_buff.skb, 1);
 	stir->rx_buff.head = stir->rx_buff.skb->data;
-	do_gettimeofday(&stir->rx_time);
+	stir->rx_time = ktime_get();
 
 	stir->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 	if (!stir->rx_urb)