When system enter suspend, there is no more wireless traffic, and
if there is no incoming data, most of the AP kick-out the client
station after few minutes because of inactivity.
The usual way to prevent this is to submit a Null function frame
periodically as a keep-alive. This is supported by brcm controllers
and can be configured via the mkeep_alive IOVAR.
Signed-off-by: Loic Poulain <loic.poulain@xxxxxxxxxx>
---
.../wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 21 +++++++++++++++++++++
.../broadcom/brcm80211/brcmfmac/fwil_types.h | 19 +++++++++++++++++++
2 files changed, 40 insertions(+)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index fb72777..afa8ceda 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -3901,6 +3901,24 @@ static void brcmf_configure_wowl(struct brcmf_cfg80211_info *cfg,
cfg->wowl.active = true;
}
+int brcmf_keepalive_start(struct brcmf_if *ifp, unsigned int interval)
+{
+ struct brcmf_mkeep_alive_pkt_le kalive = {0};
+ int ret = 0;
+
+ /* Configure Null function/data keepalive */
+ kalive.version = cpu_to_le16(1);
+ kalive.period_msec = cpu_to_le16(interval * MSEC_PER_SEC);
+ kalive.len_bytes = cpu_to_le16(0);
+ kalive.keep_alive_id = cpu_to_le16(0);
+
+ ret = brcmf_fil_iovar_data_set(ifp, "mkeep_alive", &kalive, sizeof(kalive));
+ if (ret)
+ brcmf_err("keep-alive packet config failed, ret=%d\n", ret);
+
+ return ret;
+}
+
static s32 brcmf_cfg80211_suspend(struct wiphy *wiphy,
struct cfg80211_wowlan *wowl)
{
@@ -3947,6 +3965,9 @@ static s32 brcmf_cfg80211_suspend(struct wiphy *wiphy,
} else {
/* Configure WOWL paramaters */
brcmf_configure_wowl(cfg, ifp, wowl);
+
+ /* Prevent disassociation due to inactivity with keep-alive */
+ brcmf_keepalive_start(ifp, 30);
}
exit:
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h
index ff2ef55..e69d1e5 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h
@@ -1052,4 +1052,23 @@ struct brcmf_gscan_config {
struct brcmf_gscan_bucket_config bucket[1];
};
+/**
+ * struct brcmf_mkeep_alive_pkt_le - configuration data for keep-alive frame.
+ *
+ * @version: version for mkeep_alive
+ * @length: length of fixed parameters in the structure.
+ * @period_msec: keep-alive period in milliseconds.
+ * @len_bytes: size of the data.
+ * @keep_alive_id: ID (0 - 3).
+ * @data: keep-alive frame data.
+ */
+struct brcmf_mkeep_alive_pkt_le {
+ __le16 version;
+ __le16 length;
+ __le32 period_msec;
+ __le16 len_bytes;
+ u8 keep_alive_id;
+ u8 data[0];
+} __packed;
+
#endif /* FWIL_TYPES_H_ */
--
2.7.4
