From 8b44f0dd2f90acd6c8842537223b39f890f2e713 Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Thu, 30 Jul 2015 12:13:29 +0200 Subject: [PATCH] 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 Signed-off-by: Marcel Holtmann --- drivers/net/ieee802154/at86rf230.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/ieee802154/at86rf230.c b/drivers/net/ieee802154/at86rf230.c index f7bd9f3ddaac..d0d5bf6cbb68 100644 --- 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); -- 2.39.5