[kbuild-all] [linux-review:UPDATE-20201019-144130/Shay-Bar/mac80211-160MHz-support-per-IEEE802-11ax-standard/20201012-221911 1/1] net/mac80211/spectmgmt.c:232:42: sparse: sparse: cast to restricted __le16

tree: https://github.com/0day-ci/linux/commits/UPDATE-20201019-144130/Shay-Bar/... head: 0ede483fb5b54c0e7af13f36bd07f399c84c0d1c commit: 0ede483fb5b54c0e7af13f36bd07f399c84c0d1c [1/1] mac80211: 160MHz support per IEEE802.11ax standard config: powerpc64-randconfig-s032-20201019 (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-dirty # https://github.com/0day-ci/linux/commit/0ede483fb5b54c0e7af13f36bd07f399c... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review UPDATE-20201019-144130/Shay-Bar/mac80211-160MHz-support-per-IEEE802-11ax-standard/20201012-221911 git checkout 0ede483fb5b54c0e7af13f36bd07f399c84c0d1c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; "sparse warnings: (new ones prefixed by >>)" vim +232 net/mac80211/spectmgmt.c 96 97 int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata, 98 struct ieee802_11_elems *elems, 99 enum nl80211_band current_band, 100 u32 vht_cap_info, 101 u32 sta_flags, u8 *bssid, 102 struct ieee80211_csa_ie *csa_ie) 103 { 104 enum nl80211_band new_band = current_band; 105 int new_freq; 106 u8 new_chan_no; 107 struct ieee80211_channel *new_chan; 108 struct cfg80211_chan_def new_vht_chandef = {}; 109 const struct ieee80211_sec_chan_offs_ie *sec_chan_offs; 110 const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie; 111 int secondary_channel_offset = -1; 112 113 memset(csa_ie, 0, sizeof(*csa_ie)); 114 115 sec_chan_offs = elems->sec_chan_offs; 116 wide_bw_chansw_ie = elems->wide_bw_chansw_ie; 117 118 if (sta_flags & (IEEE80211_STA_DISABLE_HT | 119 IEEE80211_STA_DISABLE_40MHZ)) { 120 sec_chan_offs = NULL; 121 wide_bw_chansw_ie = NULL; 122 } 123 124 if (sta_flags & IEEE80211_STA_DISABLE_VHT) 125 wide_bw_chansw_ie = NULL; 126 127 if (elems->ext_chansw_ie) { 128 if (!ieee80211_operating_class_to_band( 129 elems->ext_chansw_ie->new_operating_class, 130 &new_band)) { 131 sdata_info(sdata, 132 "cannot understand ECSA IE operating class, %d, ignoring\n", 133 elems->ext_chansw_ie->new_operating_class); 134 } 135 new_chan_no = elems->ext_chansw_ie->new_ch_num; 136 csa_ie->count = elems->ext_chansw_ie->count; 137 csa_ie->mode = elems->ext_chansw_ie->mode; 138 } else if (elems->ch_switch_ie) { 139 new_chan_no = elems->ch_switch_ie->new_ch_num; 140 csa_ie->count = elems->ch_switch_ie->count; 141 csa_ie->mode = elems->ch_switch_ie->mode; 142 } else { 143 /* nothing here we understand */ 144 return 1; 145 } 146 147 /* Mesh Channel Switch Parameters Element */ 148 if (elems->mesh_chansw_params_ie) { 149 csa_ie->ttl = elems->mesh_chansw_params_ie->mesh_ttl; 150 csa_ie->mode = elems->mesh_chansw_params_ie->mesh_flags; 151 csa_ie->pre_value = le16_to_cpu( 152 elems->mesh_chansw_params_ie->mesh_pre_value); 153 154 if (elems->mesh_chansw_params_ie->mesh_flags & 155 WLAN_EID_CHAN_SWITCH_PARAM_REASON) 156 csa_ie->reason_code = le16_to_cpu( 157 elems->mesh_chansw_params_ie->mesh_reason); 158 } 159 160 new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band); 161 new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); 162 if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) { 163 sdata_info(sdata, 164 "BSS %pM switches to unsupported channel (%d MHz), disconnecting\n", 165 bssid, new_freq); 166 return -EINVAL; 167 } 168 169 if (sec_chan_offs) { 170 secondary_channel_offset = sec_chan_offs->sec_chan_offs; 171 } else if (!(sta_flags & IEEE80211_STA_DISABLE_HT)) { 172 /* If the secondary channel offset IE is not present, 173 * we can't know what's the post-CSA offset, so the 174 * best we can do is use 20MHz. 175 */ 176 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 177 } 178 179 switch (secondary_channel_offset) { 180 default: 181 /* secondary_channel_offset was present but is invalid */ 182 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 183 cfg80211_chandef_create(&csa_ie->chandef, new_chan, 184 NL80211_CHAN_HT20); 185 break; 186 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 187 cfg80211_chandef_create(&csa_ie->chandef, new_chan, 188 NL80211_CHAN_HT40PLUS); 189 break; 190 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 191 cfg80211_chandef_create(&csa_ie->chandef, new_chan, 192 NL80211_CHAN_HT40MINUS); 193 break; 194 case -1: 195 cfg80211_chandef_create(&csa_ie->chandef, new_chan, 196 NL80211_CHAN_NO_HT); 197 /* keep width for 5/10 MHz channels */ 198 switch (sdata->vif.bss_conf.chandef.width) { 199 case NL80211_CHAN_WIDTH_5: 200 case NL80211_CHAN_WIDTH_10: 201 csa_ie->chandef.width = 202 sdata->vif.bss_conf.chandef.width; 203 break; 204 default: 205 break; 206 } 207 break; 208 } 209 210 if (wide_bw_chansw_ie) { 211 u8 new_channel_width = wide_bw_chansw_ie->new_channel_width; 212 u8 new_seg0 = wide_bw_chansw_ie->new_center_freq_seg0; 213 u8 new_seg1 = wide_bw_chansw_ie->new_center_freq_seg1; 214 enum ieee80211_vht_chanwidth act_chanwidth = 215 ieee80211_vht_get_actual_chwidth( 216 new_channel_width, new_seg0, new_seg1); 217 enum ieee80211_center_freq_seg1 seg1_location = 218 ieee80211_get_center_freq_seg1_location(sdata, 219 vht_cap_info, 220 act_chanwidth); 221 struct ieee80211_vht_operation vht_oper = { 222 .chan_width = new_channel_width, 223 .center_freq_seg0_idx = new_seg0, 224 /* .basic_mcs_set doesn't matter */ 225 }; 226 struct ieee80211_ht_operation ht_oper = {}; 227 228 if (seg1_location == IEEE80211_CENTER_FREQ_SEG1_VHT_OPER) 229 vht_oper.center_freq_seg1_idx = new_seg1; 230 else if (seg1_location == IEEE80211_CENTER_FREQ_SEG1_HT_OPER) 233 IEEE80211_HT_OP_MODE_CCFS2_SHIFT); 234 235 /* default, for the case of IEEE80211_VHT_CHANWIDTH_USE_HT, 236 * to the previously parsed chandef 237 */ 238 new_vht_chandef = csa_ie->chandef; 239 240 /* ignore if parsing fails */ 241 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 242 vht_cap_info, 243 &vht_oper, &ht_oper, 244 &new_vht_chandef)) 245 new_vht_chandef.chan = NULL; 246 247 if (sta_flags & IEEE80211_STA_DISABLE_80P80MHZ && 248 new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80) 249 ieee80211_chandef_downgrade(&new_vht_chandef); 250 if (sta_flags & IEEE80211_STA_DISABLE_160MHZ && 251 new_vht_chandef.width == NL80211_CHAN_WIDTH_160) 252 ieee80211_chandef_downgrade(&new_vht_chandef); 253 } 254 255 /* if VHT data is there validate & use it */ 256 if (new_vht_chandef.chan) { 257 if (!cfg80211_chandef_compatible(&new_vht_chandef, 258 &csa_ie->chandef)) { 259 sdata_info(sdata, 260 "BSS %pM: CSA has inconsistent channel data, disconnecting\n", 261 bssid); 262 return -EINVAL; 263 } 264 csa_ie->chandef = new_vht_chandef; 265 } 266 267 if (elems->max_channel_switch_time) 268 csa_ie->max_switch_time = 269 (elems->max_channel_switch_time[0] << 0) | 270 (elems->max_channel_switch_time[1] << 8) | 271 (elems->max_channel_switch_time[2] << 16); 272 273 return 0; 274 } 275 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org