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Subject[PATCH 08/19] staging: wfx: fix support for BSS_CHANGED_KEEP_ALIVE
Date
From: Jérôme Pouiller <jerome.pouiller@silabs.com>

Chip firmware is able to send periodic null frames to keep the
association with the AP.

The driver arbitrary set this period to 30sec. We prefer to rely on
BSS_CHANGED_KEEP_ALIVE that provide a true value.

Note that if BSS_CHANGED_KEEP_ALIVE is not received, we just disable
keep_alive feature. It is not very disturbing since AP will probably
ping the station before to disconnect it.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
drivers/staging/wfx/sta.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c
index 7693ce22f300..67e16c435848 100644
--- a/drivers/staging/wfx/sta.c
+++ b/drivers/staging/wfx/sta.c
@@ -646,7 +646,7 @@ static void wfx_join_finalize(struct wfx_vif *wvif,

if (!info->ibss_joined) {
wvif->state = WFX_STATE_STA;
- hif_keep_alive_period(wvif, 30 /* sec */);
+ hif_keep_alive_period(wvif, 0);
hif_set_bss_params(wvif, &wvif->bss_params);
hif_set_beacon_wakeup_period(wvif, info->dtim_period,
info->dtim_period);
@@ -728,6 +728,10 @@ void wfx_bss_info_changed(struct ieee80211_hw *hw,
__func__);
}

+ if (changed & BSS_CHANGED_KEEP_ALIVE)
+ hif_keep_alive_period(wvif, info->max_idle_period *
+ USEC_PER_TU / USEC_PER_MSEC);
+
if (changed & BSS_CHANGED_ASSOC ||
changed & BSS_CHANGED_ERP_CTS_PROT ||
changed & BSS_CHANGED_ERP_PREAMBLE) {
--
2.25.1
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