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authorThomas Pugliese <thomas.pugliese@gmail.com>2014-04-25 10:30:32 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-05-27 14:56:54 -0700
commit90ec00d54e28f4b038e66905ea5b9478bcdc3f37 (patch)
tree71ed3bc15a264277adcad0b562d8198d8656759f /drivers/uwb
parentbae00c1ac3b3f32a0f7f1964054f6c3f33559607 (diff)
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>
Diffstat (limited to 'drivers/uwb')
-rw-r--r--drivers/uwb/rsv.c7
1 files changed, 6 insertions, 1 deletions
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;
}

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