uwb: fix channel change failure
Make the transition to the UWB_RSV_STATE_NONE state synchronous so that
there is not a race between uwb_rsv_terminate and uwb_rsv_establish.
uwb_rsv_terminate would set the rsv->state to UWB_RSV_STATE_NONE but did
not release the stream resource until a 320ms timeout had expired. If a
user called uwb_rsv_establish during that time, it could fail to
establish the reservation because no stream resources were available.
This patch removes the timer from the uwb_rsv_terminate process since it
is not needed when transitioning to UWB_RSV_STATE_NONE.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/uwb/rsv.c b/drivers/uwb/rsv.c
index 3fe6119..4026f1a 100644
--- a/drivers/uwb/rsv.c
+++ b/drivers/uwb/rsv.c
@@ -249,7 +249,9 @@
* super frame and should not be terminated if no response is
* received.
*/
- if (rsv->is_multicast) {
+ if (rsv->state == UWB_RSV_STATE_NONE) {
+ sframes = 0;
+ } else if (rsv->is_multicast) {
if (rsv->state == UWB_RSV_STATE_O_INITIATED
|| rsv->state == UWB_RSV_STATE_O_MOVE_EXPANDING
|| rsv->state == UWB_RSV_STATE_O_MOVE_COMBINING
@@ -322,6 +324,7 @@
switch (new_state) {
case UWB_RSV_STATE_NONE:
uwb_rsv_state_update(rsv, UWB_RSV_STATE_NONE);
+ uwb_rsv_remove(rsv);
uwb_rsv_callback(rsv);
break;
case UWB_RSV_STATE_O_INITIATED:
@@ -442,6 +445,8 @@
uwb_rsv_set_state(rsv, UWB_RSV_STATE_T_ACCEPTED);
uwb_drp_avail_release(rsv->rc, &rsv->mv.companion_mas);
goto unlock;
+ case UWB_RSV_STATE_NONE:
+ goto unlock;
default:
break;
}
