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wcn36xx: Treat repeated BMPS entry fail as connection loss

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On an open AP when you pull the plug on the AP, if we are not already in
BMPS mode then the firmware will not generate a disconnection event.

Instead we need to monitor for failure to enter BMPS and treat a string of
failures as connection loss.

Secure AP connections don't appear to demonstrate this behavior so the
work-around is limited to open APs only.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20211022140447.2846248-2-bryan.odonoghue@linaro.org
This commit is contained in:
Bryan O'Donoghue 2021-10-22 15:04:46 +01:00 • committed by Kalle Valo
parent a224b47ab3
commit 2f1ae32f73
2 changed files with 10 additions and 0 deletions
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8
drivers/net/wireless/ath/wcn36xx/pmc.c
View file

@ -18,6 +18,8 @@
#include "wcn36xx.h"
#define WCN36XX_BMPS_FAIL_THREHOLD 3
int wcn36xx_pmc_enter_bmps_state(struct wcn36xx *wcn,
struct ieee80211_vif *vif)
{
@ -31,6 +33,7 @@ int wcn36xx_pmc_enter_bmps_state(struct wcn36xx *wcn,
if (!ret) {
wcn36xx_dbg(WCN36XX_DBG_PMC, "Entered BMPS\n");
vif_priv->pw_state = WCN36XX_BMPS;
vif_priv->bmps_fail_ct = 0;
vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER;
} else {
/*
@ -39,6 +42,11 @@ int wcn36xx_pmc_enter_bmps_state(struct wcn36xx *wcn,
* received just after auth complete
*/
wcn36xx_err("Can not enter BMPS!\n");
if (vif_priv->bmps_fail_ct++ == WCN36XX_BMPS_FAIL_THREHOLD) {
ieee80211_connection_loss(vif);
vif_priv->bmps_fail_ct = 0;
}
}
return ret;
}

2
drivers/net/wireless/ath/wcn36xx/wcn36xx.h
View file

@ -151,6 +151,8 @@ struct wcn36xx_vif {
} rekey_data;
struct list_head sta_list;
int bmps_fail_ct;
};
/**