From 90ec00d54e28f4b038e66905ea5b9478bcdc3f37 Mon Sep 17 00:00:00 2001 From: Thomas Pugliese Date: Fri, 25 Apr 2014 10:30:32 -0500 Subject: 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 Signed-off-by: Greg Kroah-Hartman --- drivers/uwb/rsv.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/uwb') diff --git a/drivers/uwb/rsv.c b/drivers/uwb/rsv.c index 3fe611941046..4026f1adff01 100644 --- a/drivers/uwb/rsv.c +++ b/drivers/uwb/rsv.c @@ -249,7 +249,9 @@ static void uwb_rsv_stroke_timer(struct uwb_rsv *rsv) * 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 @@ void uwb_rsv_set_state(struct uwb_rsv *rsv, enum uwb_rsv_state new_state) 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 @@ static void uwb_rsv_handle_timeout_work(struct work_struct *work) 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; } -- cgit v1.2.3