Author: bschmidt
Date: Mon Dec 6 19:05:44 2010
New Revision: 216238
URL: http://svn.freebsd.org/changeset/base/216238
Log:
Fix scanning after loosing a connection. The firmware assumes that as long
as an association ID is set any scan is supposed to be a background scan.
This implies that the firmware will switch back to the associated channel
after a certain threshold, though, we are not notified about that. We
currently catch this case by a timer which will reset the firmware after
a 'scan timeout', though, upper layers are not notified about that and
will simply hang until manual intervention. Fix this by resetting the
firmware's knowledge about any association on RUN -> ASSOC and
!INIT -> SCAN transitions.
Tested by: Zhihao Yuan <lichray at gmail.com>
MFC after: 1 week
Modified:
head/sys/dev/wpi/if_wpi.c
Modified: head/sys/dev/wpi/if_wpi.c
==============================================================================
--- head/sys/dev/wpi/if_wpi.c Mon Dec 6 18:28:39 2010 (r216237)
+++ head/sys/dev/wpi/if_wpi.c Mon Dec 6 19:05:44 2010 (r216238)
@@ -1248,8 +1248,25 @@ wpi_newstate(struct ieee80211vap *vap, e
IEEE80211_UNLOCK(ic);
WPI_LOCK(sc);
- if (nstate == IEEE80211_S_AUTH) {
- /* The node must be registered in the firmware before auth */
+ if (nstate == IEEE80211_S_SCAN && vap->iv_state != IEEE80211_S_INIT) {
+ /*
+ * On !INIT -> SCAN transitions, we need to clear any possible
+ * knowledge about associations.
+ */
+ error = wpi_config(sc);
+ if (error != 0) {
+ device_printf(sc->sc_dev,
+ "%s: device config failed, error %d\n",
+ __func__, error);
+ }
+ }
+ if (nstate == IEEE80211_S_AUTH ||
+ (nstate == IEEE80211_S_ASSOC && vap->iv_state == IEEE80211_S_RUN)) {
+ /*
+ * The node must be registered in the firmware before auth.
+ * Also the associd must be cleared on RUN -> ASSOC
+ * transitions.
+ */
error = wpi_auth(sc, vap);
if (error != 0) {
device_printf(sc->sc_dev,
_______________________________________________
svn-src-head@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
