ath6kl: implement scheduled scan
ath6kl firmware supports scheduled scan functionality with the wow ssid
filter. But the firmware does not send any events after scan results
so I had to add a timer which notifies about new scan results.
Sched scan needs firmware version 3.2.0.6 or later. If firmware doesn't
support sched scan the driver will not enable the feature.
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
diff --git a/drivers/net/wireless/ath/ath6kl/wmi.c b/drivers/net/wireless/ath/ath6kl/wmi.c
index aa1a252..75e0f5e 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.c
+++ b/drivers/net/wireless/ath/ath6kl/wmi.c
@@ -977,6 +977,13 @@
return 0;
}
+void ath6kl_wmi_sscan_timer(unsigned long ptr)
+{
+ struct ath6kl_vif *vif = (struct ath6kl_vif *) ptr;
+
+ cfg80211_sched_scan_results(vif->ar->wiphy);
+}
+
static int ath6kl_wmi_bssinfo_event_rx(struct wmi *wmi, u8 *datap, int len,
struct ath6kl_vif *vif)
{
@@ -1066,6 +1073,21 @@
return -ENOMEM;
cfg80211_put_bss(bss);
+ /*
+ * Firmware doesn't return any event when scheduled scan has
+ * finished, so we need to use a timer to find out when there are
+ * no more results.
+ *
+ * The timer is started from the first bss info received, otherwise
+ * the timer would not ever fire if the scan interval is short
+ * enough.
+ */
+ if (ar->state == ATH6KL_STATE_SCHED_SCAN &&
+ !timer_pending(&vif->sched_scan_timer)) {
+ mod_timer(&vif->sched_scan_timer, jiffies +
+ msecs_to_jiffies(ATH6KL_SCHED_SCAN_RESULT_DELAY));
+ }
+
return 0;
}
@@ -2940,7 +2962,10 @@
p = (struct wmi_set_appie_cmd *) skb->data;
p->mgmt_frm_type = mgmt_frm_type;
p->ie_len = ie_len;
- memcpy(p->ie_info, ie, ie_len);
+
+ if (ie != NULL && ie_len > 0)
+ memcpy(p->ie_info, ie, ie_len);
+
return ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_APPIE_CMDID,
NO_SYNC_WMIFLAG);
}