at86rf230: remove hrtimer on 1 usec delay

According Documentation/timers/timers-howto.txt the usually case for
setting up a hrtimer takes > ~10us. So we should use udelay in this
case so we are sure that the state change was done, before doing the
state change assert.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/drivers/net/ieee802154/at86rf230.c b/drivers/net/ieee802154/at86rf230.c
index f7bd9f3ddaac8c2044e2ea3215e02b98fdc3587d..d0d5bf6cbb686a357e4e5ed98ad652c0dbf6908a 100644 (file)
--- a/drivers/net/ieee802154/at86rf230.c
+++ b/drivers/net/ieee802154/at86rf230.c
@@ -545,7 +545,9 @@ at86rf230_async_state_delay(void *context)
        }
 
        /* Default delay is 1us in the most cases */
-       tim = ktime_set(0, NSEC_PER_USEC);
+       udelay(1);
+       at86rf230_async_state_timer(&ctx->timer);
+       return;
 
 change:
        hrtimer_start(&ctx->timer, tim, HRTIMER_MODE_REL);