diff options
author | Jouni Malinen <jouni.malinen@atheros.com> | 2009-05-20 14:59:08 -0400 |
---|---|---|
committer | John W. Linville <linville@tuxdriver.com> | 2009-05-22 14:06:01 -0400 |
commit | ccdfeab6536ae55d43436ffaae949afde6e962ca (patch) | |
tree | df00994be9edcaf8e8fd4d97ebafe74e710722d5 /drivers/net/wireless/ath/ath9k/main.c | |
parent | 267a90127472be70b02ab13cbd355b5013e2aa51 (diff) |
ath9k: Update Beacon timers based on timestamp from the AP
Some APs seem to drift away from the expected TBTT (timestamp %
beacon_int_in_usec differs quite a bit from zero) which can result in
us waking up way too early to receive a Beacon frame. In order to work
around this, re-configure the Beacon timers after having received a
Beacon frame from the AP (i.e., when we know the offset between the
expected TBTT and the actual time the AP is sending out the Beacon
frame).
Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/main.c')
-rw-r--r-- | drivers/net/wireless/ath/ath9k/main.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index 5759c9465029..61da08a1648c 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c | |||
@@ -487,7 +487,7 @@ static void ath9k_tasklet(unsigned long data) | |||
487 | * the next Beacon. | 487 | * the next Beacon. |
488 | */ | 488 | */ |
489 | DPRINTF(sc, ATH_DBG_PS, "TSFOOR - Sync with next Beacon\n"); | 489 | DPRINTF(sc, ATH_DBG_PS, "TSFOOR - Sync with next Beacon\n"); |
490 | sc->sc_flags |= SC_OP_WAIT_FOR_BEACON; | 490 | sc->sc_flags |= SC_OP_WAIT_FOR_BEACON | SC_OP_BEACON_SYNC; |
491 | } | 491 | } |
492 | 492 | ||
493 | /* re-enable hardware interrupt */ | 493 | /* re-enable hardware interrupt */ |
@@ -914,6 +914,13 @@ static void ath9k_bss_assoc_info(struct ath_softc *sc, | |||
914 | if (avp->av_opmode == NL80211_IFTYPE_STATION) { | 914 | if (avp->av_opmode == NL80211_IFTYPE_STATION) { |
915 | sc->curaid = bss_conf->aid; | 915 | sc->curaid = bss_conf->aid; |
916 | ath9k_hw_write_associd(sc); | 916 | ath9k_hw_write_associd(sc); |
917 | |||
918 | /* | ||
919 | * Request a re-configuration of Beacon related timers | ||
920 | * on the receipt of the first Beacon frame (i.e., | ||
921 | * after time sync with the AP). | ||
922 | */ | ||
923 | sc->sc_flags |= SC_OP_BEACON_SYNC; | ||
917 | } | 924 | } |
918 | 925 | ||
919 | /* Configure the beacon */ | 926 | /* Configure the beacon */ |