package/kernel/mac80211/patches/357-0004-brcmfmac-fix-handling-ssids-in-.sched_scan_start-cal.patch

   1 From 3e2e86ab19c2a43953de30089c5411c580ddb5f7 Mon Sep 17 00:00:00 2001
   2 From: Arend Van Spriel <arend.vanspriel@broadcom.com>
   3 Date: Wed, 23 Nov 2016 10:25:23 +0000
   4 Subject: [PATCH] brcmfmac: fix handling ssids in .sched_scan_start() callback
   5
   6 The ssids list in the scheduled scan request were not properly taken
   7 into account when configuring in firmware. The hidden bit was set for
   8 any ssid resulting in active scanning for all. Only set it for ssids
   9 that are in the ssids list.
  10
  11 Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
  12 Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
  13 Reviewed-by: Franky Lin <franky.lin@broadcom.com>
  14 Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
  15 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  16 ---
  17  .../broadcom/brcm80211/brcmfmac/cfg80211.c         | 103 ++++++++++-----------
  18  .../net/wireless/broadcom/brcm80211/brcmfmac/pno.c |  18 ++++
  19  .../net/wireless/broadcom/brcm80211/brcmfmac/pno.h |  12 ++-
  20  3 files changed, 76 insertions(+), 57 deletions(-)
  21
  22 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
  23 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
  24 @@ -3314,19 +3314,37 @@ out_err:
  25         return err;
  26  }
  27
  28 +static bool brcmf_is_ssid_active(struct cfg80211_ssid *ssid,
  29 +                                struct cfg80211_sched_scan_request *req)
  30 +{
  31 +       int i;
  32 +
  33 +       if (!ssid || !req->ssids || !req->n_ssids)
  34 +               return false;
  35 +
  36 +       for (i = 0; i < req->n_ssids; i++) {
  37 +               if (ssid->ssid_len == req->ssids[i].ssid_len) {
  38 +                       if (!strncmp(ssid->ssid, req->ssids[i].ssid,
  39 +                                    ssid->ssid_len))
  40 +                               return true;
  41 +               }
  42 +       }
  43 +       return false;
  44 +}
  45 +
  46  static int
  47  brcmf_cfg80211_sched_scan_start(struct wiphy *wiphy,
  48                                 struct net_device *ndev,
  49 -                               struct cfg80211_sched_scan_request *request)
  50 +                               struct cfg80211_sched_scan_request *req)
  51  {
  52         struct brcmf_if *ifp = netdev_priv(ndev);
  53         struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
  54 -       struct brcmf_pno_net_param_le pfn;
  55 +       struct cfg80211_ssid *ssid;
  56         int i;
  57         int ret = 0;
  58
  59         brcmf_dbg(SCAN, "Enter n_match_sets:%d n_ssids:%d\n",
  60 -                 request->n_match_sets, request->n_ssids);
  61 +                 req->n_match_sets, req->n_ssids);
  62         if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status)) {
  63                 brcmf_err("Scanning already: status (%lu)\n", cfg->scan_status);
  64                 return -EAGAIN;
  65 @@ -3337,71 +3355,46 @@ brcmf_cfg80211_sched_scan_start(struct w
  66                 return -EAGAIN;
  67         }
  68
  69 -       if (!request->n_ssids || !request->n_match_sets) {
  70 -               brcmf_dbg(SCAN, "Invalid sched scan req!! n_ssids:%d\n",
  71 -                         request->n_ssids);
  72 +       if (req->n_match_sets <= 0) {
  73 +               brcmf_dbg(SCAN, "invalid number of matchsets specified: %d\n",
  74 +                         req->n_match_sets);
  75                 return -EINVAL;
  76         }
  77
  78 -       if (request->n_ssids > 0) {
  79 -               for (i = 0; i < request->n_ssids; i++) {
  80 -                       /* Active scan req for ssids */
  81 -                       brcmf_dbg(SCAN, ">>> Active scan req for ssid (%s)\n",
  82 -                                 request->ssids[i].ssid);
  83 -
  84 -                       /* match_set ssids is a supert set of n_ssid list,
  85 -                        * so we need not add these set separately.
  86 -                        */
  87 -               }
  88 +       /* clean up everything */
  89 +       ret = brcmf_pno_clean(ifp);
  90 +       if  (ret < 0) {
  91 +               brcmf_err("failed error=%d\n", ret);
  92 +               return ret;
  93         }
  94
  95 -       if (request->n_match_sets > 0) {
  96 -               /* clean up everything */
  97 -               ret = brcmf_pno_clean(ifp);
  98 -               if  (ret < 0) {
  99 -                       brcmf_err("failed error=%d\n", ret);
 100 -                       return ret;
 101 +       /* configure pno */
 102 +       ret = brcmf_pno_config(ifp, req);
 103 +       if (ret < 0)
 104 +               return ret;
 105 +
 106 +       /* configure each match set */
 107 +       for (i = 0; i < req->n_match_sets; i++) {
 108 +
 109 +               ssid = &req->match_sets[i].ssid;
 110 +
 111 +               if (!ssid->ssid_len) {
 112 +                       brcmf_err("skip broadcast ssid\n");
 113 +                       continue;
 114                 }
 115
 116 -               /* configure pno */
 117 -               ret = brcmf_pno_config(ifp, request);
 118 +               ret = brcmf_pno_add_ssid(ifp, ssid,
 119 +                                        brcmf_is_ssid_active(ssid, req));
 120                 if (ret < 0)
 121 -                       return ret;
 122 -
 123 -               /* configure each match set */
 124 -               for (i = 0; i < request->n_match_sets; i++) {
 125 -                       struct cfg80211_ssid *ssid;
 126 -                       u32 ssid_len;
 127 -
 128 -                       ssid = &request->match_sets[i].ssid;
 129 -                       ssid_len = ssid->ssid_len;
 130 -
 131 -                       if (!ssid_len) {
 132 -                               brcmf_err("skip broadcast ssid\n");
 133 -                               continue;
 134 -                       }
 135 -                       pfn.auth = cpu_to_le32(WLAN_AUTH_OPEN);
 136 -                       pfn.wpa_auth = cpu_to_le32(BRCMF_PNO_WPA_AUTH_ANY);
 137 -                       pfn.wsec = cpu_to_le32(0);
 138 -                       pfn.infra = cpu_to_le32(1);
 139 -                       pfn.flags = cpu_to_le32(1 << BRCMF_PNO_HIDDEN_BIT);
 140 -                       pfn.ssid.SSID_len = cpu_to_le32(ssid_len);
 141 -                       memcpy(pfn.ssid.SSID, ssid->ssid, ssid_len);
 142 -                       ret = brcmf_fil_iovar_data_set(ifp, "pfn_add", &pfn,
 143 -                                                      sizeof(pfn));
 144                         brcmf_dbg(SCAN, ">>> PNO filter %s for ssid (%s)\n",
 145                                   ret == 0 ? "set" : "failed", ssid->ssid);
 146 -               }
 147 -               /* Enable the PNO */
 148 -               if (brcmf_fil_iovar_int_set(ifp, "pfn", 1) < 0) {
 149 -                       brcmf_err("PNO enable failed!! ret=%d\n", ret);
 150 -                       return -EINVAL;
 151 -               }
 152 -       } else {
 153 -               return -EINVAL;
 154         }
 155 +       /* Enable the PNO */
 156 +       ret = brcmf_fil_iovar_int_set(ifp, "pfn", 1);
 157 +       if (ret < 0)
 158 +               brcmf_err("PNO enable failed!! ret=%d\n", ret);
 159
 160 -       return 0;
 161 +       return ret;
 162  }
 163
 164  static int brcmf_cfg80211_sched_scan_stop(struct wiphy *wiphy,
 165 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c
 166 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c
 167 @@ -28,6 +28,8 @@
 168  #define BRCMF_PNO_FREQ_EXPO_MAX                3
 169  #define BRCMF_PNO_ENABLE_ADAPTSCAN_BIT 6
 170  #define BRCMF_PNO_SCAN_INCOMPLETE      0
 171 +#define BRCMF_PNO_WPA_AUTH_ANY         0xFFFFFFFF
 172 +#define BRCMF_PNO_HIDDEN_BIT           2
 173
 174  int brcmf_pno_clean(struct brcmf_if *ifp)
 175  {
 176 @@ -98,3 +100,19 @@ int brcmf_pno_config(struct brcmf_if *if
 177         return err;
 178  }
 179
 180 +int brcmf_pno_add_ssid(struct brcmf_if *ifp, struct cfg80211_ssid *ssid,
 181 +                      bool active)
 182 +{
 183 +       struct brcmf_pno_net_param_le pfn;
 184 +
 185 +       pfn.auth = cpu_to_le32(WLAN_AUTH_OPEN);
 186 +       pfn.wpa_auth = cpu_to_le32(BRCMF_PNO_WPA_AUTH_ANY);
 187 +       pfn.wsec = cpu_to_le32(0);
 188 +       pfn.infra = cpu_to_le32(1);
 189 +       if (active)
 190 +               pfn.flags = cpu_to_le32(1 << BRCMF_PNO_HIDDEN_BIT);
 191 +       pfn.ssid.SSID_len = cpu_to_le32(ssid->ssid_len);
 192 +       memcpy(pfn.ssid.SSID, ssid->ssid, ssid->ssid_len);
 193 +       return brcmf_fil_iovar_data_set(ifp, "pfn_add", &pfn, sizeof(pfn));
 194 +}
 195 +
 196 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.h
 197 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.h
 198 @@ -17,8 +17,6 @@
 199  #define _BRCMF_PNO_H
 200
 201  #define BRCMF_PNO_SCAN_COMPLETE                1
 202 -#define BRCMF_PNO_WPA_AUTH_ANY         0xFFFFFFFF
 203 -#define BRCMF_PNO_HIDDEN_BIT           2
 204  #define BRCMF_PNO_MAX_PFN_COUNT                16
 205
 206  /**
 207 @@ -37,4 +35,14 @@ int brcmf_pno_clean(struct brcmf_if *ifp
 208  int brcmf_pno_config(struct brcmf_if *ifp,
 209                      struct cfg80211_sched_scan_request *request);
 210
 211 +/**
 212 + * brcmf_pno_add_ssid - add ssid for pno in firmware.
 213 + *
 214 + * @ifp: interface object used.
 215 + * @ssid: ssid information.
 216 + * @active: indicate this ssid needs to be actively probed.
 217 + */
 218 +int brcmf_pno_add_ssid(struct brcmf_if *ifp, struct cfg80211_ssid *ssid,
 219 +                      bool active);
 220 +
 221  #endif /* _BRCMF_PNO_H */