mac802154: add synchronization handling
This patch adds synchronization handling in start and stop driver ops
calls. This patch is mostly grab from mac80211 which was introduced by
commit ea77f12f2cc0f31168f2e0259e65a22202ac4dc2 ("mac80211: remove
tasklet enable/disable"). This is to be sure that we don't run into same
issues.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/mac802154/driver-ops.h b/net/mac802154/driver-ops.h
index bb3ee03..4b820cf 100644
--- a/net/mac802154/driver-ops.h
+++ b/net/mac802154/driver-ops.h
@@ -30,6 +30,7 @@
might_sleep();
local->started = true;
+ smp_mb();
return local->ops->start(&local->hw);
}
@@ -40,6 +41,12 @@
local->ops->stop(&local->hw);
+ /* sync away all work on the tasklet before clearing started */
+ tasklet_disable(&local->tasklet);
+ tasklet_enable(&local->tasklet);
+
+ barrier();
+
local->started = false;
}