package/kernel/mac80211/patches/319-v4.12-0009-brcmfmac-only-add-channels-and-ssids-once-in-scan-re.patch

   1 From 6ea51fc708aedcf411f355de65a704ecda501bc4 Mon Sep 17 00:00:00 2001
   2 From: Arend Van Spriel <arend.vanspriel@broadcom.com>
   3 Date: Thu, 6 Apr 2017 13:14:42 +0100
   4 Subject: [PATCH] brcmfmac: only add channels and ssids once in scan request
   5
   6 When receiving pno results there may be duplicate channels and/or
   7 ssids. Assure each is added only once when preparing the internal
   8 escan request.
   9
  10 Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
  11 Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
  12 Reviewed-by: Franky Lin <franky.lin@broadcom.com>
  13 Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
  14 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  15 ---
  16  .../wireless/broadcom/brcm80211/brcmfmac/cfg80211.c  | 20 ++++++++++++++++----
  17  1 file changed, 16 insertions(+), 4 deletions(-)
  18
  19 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
  20 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
  21 @@ -3216,7 +3216,7 @@ static int brcmf_internal_escan_add_info
  22  {
  23         struct ieee80211_channel *chan;
  24         enum nl80211_band band;
  25 -       int freq;
  26 +       int freq, i;
  27
  28         if (channel <= CH_MAX_2G_CHANNEL)
  29                 band = NL80211_BAND_2GHZ;
  30 @@ -3231,10 +3231,22 @@ static int brcmf_internal_escan_add_info
  31         if (!chan)
  32                 return -EINVAL;
  33
  34 -       req->channels[req->n_channels++] = chan;
  35 -       memcpy(req->ssids[req->n_ssids].ssid, ssid, ssid_len);
  36 -       req->ssids[req->n_ssids++].ssid_len = ssid_len;
  37 -
  38 +       for (i = 0; i < req->n_channels; i++) {
  39 +               if (req->channels[i] == chan)
  40 +                       break;
  41 +       }
  42 +       if (i == req->n_channels)
  43 +               req->channels[req->n_channels++] = chan;
  44 +
  45 +       for (i = 0; i < req->n_ssids; i++) {
  46 +               if (req->ssids[i].ssid_len == ssid_len &&
  47 +                   !memcmp(req->ssids[i].ssid, ssid, ssid_len))
  48 +                       break;
  49 +       }
  50 +       if (i == req->n_ssids) {
  51 +               memcpy(req->ssids[req->n_ssids].ssid, ssid, ssid_len);
  52 +               req->ssids[req->n_ssids++].ssid_len = ssid_len;
  53 +       }
  54         return 0;
  55  }
  56