From: Alexander Aring <alex.aring@gmail.com>
Date: Thu, 30 Jul 2015 10:13:29 +0000 (+0200)
Subject: at86rf230: remove hrtimer on 1 usec delay
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=8b44f0dd2f90acd6c8842537223b39f890f2e713;p=openwrt%2Fstaging%2Fblogic.git

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 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);