pktgen: Fix delay handling

After last pktgen changes, delay handling is wrong.

pktgen actually sends packets at full line speed.

Fix is to update pkt_dev->next_tx even if spin() returns early,
so that next spin() calls have a chance to see a positive delay.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 2 deletions

diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 4d11c28ca8ca..b69455217ed6 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -2105,15 +2105,17 @@ static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
 {
         ktime_t start_time, end_time;
-        s32 remaining;
+        s64 remaining;
         struct hrtimer_sleeper t;
 
         hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
         hrtimer_set_expires(&t.timer, spin_until);
 
         remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer));
-        if (remaining <= 0)
+        if (remaining <= 0) {
+                pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
                 return;
+        }
 
         start_time = ktime_now();
         if (remaining < 100)