On Sun, Apr 29, 2018 at 03:39:07AM +0200, Jesper Wallin wrote:
> Hi all,
> 
> I recently learned that my AP behaves badly and I have packet loss when
> the background scan is running.

Hi Jesper,

Can you please check if this diff makes your AP work without
hardcoding its bssid?

Index: if_iwm.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/if_iwm.c,v
retrieving revision 1.230
diff -u -p -r1.230 if_iwm.c
--- if_iwm.c    23 May 2018 17:49:20 -0000      1.230
+++ if_iwm.c    25 May 2018 17:32:41 -0000
@@ -4719,7 +4719,7 @@ iwm_lmac_scan_fill_channels(struct iwm_s
                chan->iter_count = htole16(1);
                chan->iter_interval = 0;
                chan->flags = htole32(IWM_UNIFIED_SCAN_CHANNEL_PARTIAL);
-               if (n_ssids != 0 && !bgscan)
+               if (n_ssids != 0)
                        chan->flags |= htole32(1 << 1); /* select SSID 0 */
                chan++;
                nchan++;
@@ -4746,7 +4746,7 @@ iwm_umac_scan_fill_channels(struct iwm_s
                chan->channel_num = ieee80211_mhz2ieee(c->ic_freq, 0);
                chan->iter_count = 1;
                chan->iter_interval = htole16(0);
-               if (n_ssids != 0 && !bgscan)
+               if (n_ssids != 0)
                        chan->flags = htole32(1 << 0); /* select SSID 0 */
                chan++;
                nchan++;
@@ -4898,9 +4898,6 @@ iwm_lmac_scan(struct iwm_softc *sc, int 
            IWM_LMAC_SCAN_FLAG_EXTENDED_DWELL);
        if (ic->ic_des_esslen == 0)
                req->scan_flags |= htole32(IWM_LMAC_SCAN_FLAG_PASSIVE);
-       else
-               req->scan_flags |=
-                   htole32(IWM_LMAC_SCAN_FLAG_PRE_CONNECTION);
        if (isset(sc->sc_enabled_capa, 
            IWM_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
                req->scan_flags |= htole32(IWM_LMAC_SCAN_FLAGS_RRM_ENABLED);
@@ -5098,8 +5095,6 @@ iwm_umac_scan(struct iwm_softc *sc, int 
                tail->direct_scan[0].len = ic->ic_des_esslen;
                memcpy(tail->direct_scan[0].ssid, ic->ic_des_essid,
                    ic->ic_des_esslen);
-               req->general_flags |=
-                   htole32(IWM_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT);
        } else
                req->general_flags |= htole32(IWM_UMAC_SCAN_GEN_FLAGS_PASSIVE);
 

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