drivers/net/wireless/mediatek/mt76/mt7915/init.c:339:26: sparse: sparse: cast from restricted __le16

From: kernel test robot
Date: Mon Oct 12 2020 - 06:29:41 EST


tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: bbf5c979011a099af5dc76498918ed7df445635b
commit: 00b2e16e006390069480e90478aa8b6e924996d7 mt76: mt7915: add TxBF capabilities
date: 5 months ago
config: parisc-randconfig-s032-20201012 (attached as .config)
compiler: hppa-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-rc1-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=00b2e16e006390069480e90478aa8b6e924996d7
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 00b2e16e006390069480e90478aa8b6e924996d7
# 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=parisc

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>


"sparse warnings: (new ones prefixed by >>)"
>> drivers/net/wireless/mediatek/mt76/mt7915/init.c:339:26: sparse: sparse: cast from restricted __le16
>> drivers/net/wireless/mediatek/mt76/mt7915/init.c:339:26: sparse: sparse: cast from restricted __le16
>> drivers/net/wireless/mediatek/mt76/mt7915/init.c:339:26: sparse: sparse: cast from restricted __le16
>> drivers/net/wireless/mediatek/mt76/mt7915/init.c:339:26: sparse: sparse: cast from restricted __le16
>> drivers/net/wireless/mediatek/mt76/mt7915/init.c:339:26: sparse: sparse: cast from restricted __le16
>> drivers/net/wireless/mediatek/mt76/mt7915/init.c:339:26: sparse: sparse: cast from restricted __le16

vim +339 drivers/net/wireless/mediatek/mt76/mt7915/init.c

296
297 elem->phy_cap_info[3] &= ~IEEE80211_HE_PHY_CAP3_SU_BEAMFORMER;
298 elem->phy_cap_info[4] &= ~IEEE80211_HE_PHY_CAP4_MU_BEAMFORMER;
299
300 c = IEEE80211_HE_PHY_CAP5_BEAMFORMEE_NUM_SND_DIM_UNDER_80MHZ_MASK |
301 IEEE80211_HE_PHY_CAP5_BEAMFORMEE_NUM_SND_DIM_ABOVE_80MHZ_MASK;
302 elem->phy_cap_info[5] &= ~c;
303
304 c = IEEE80211_HE_PHY_CAP6_TRIG_SU_BEAMFORMER_FB |
305 IEEE80211_HE_PHY_CAP6_TRIG_MU_BEAMFORMER_FB;
306 elem->phy_cap_info[6] &= ~c;
307
308 elem->phy_cap_info[7] &= ~IEEE80211_HE_PHY_CAP7_MAX_NC_MASK;
309
310 c = IEEE80211_HE_PHY_CAP2_NDP_4x_LTF_AND_3_2US |
311 IEEE80211_HE_PHY_CAP2_UL_MU_FULL_MU_MIMO |
312 IEEE80211_HE_PHY_CAP2_UL_MU_PARTIAL_MU_MIMO;
313 elem->phy_cap_info[2] |= c;
314
315 c = IEEE80211_HE_PHY_CAP4_SU_BEAMFORMEE |
316 IEEE80211_HE_PHY_CAP4_BEAMFORMEE_MAX_STS_UNDER_80MHZ_4 |
317 IEEE80211_HE_PHY_CAP4_BEAMFORMEE_MAX_STS_ABOVE_80MHZ_4;
318 elem->phy_cap_info[4] |= c;
319
320 /* do not support NG16 due to spec D4.0 changes subcarrier idx */
321 c = IEEE80211_HE_PHY_CAP6_CODEBOOK_SIZE_42_SU |
322 IEEE80211_HE_PHY_CAP6_CODEBOOK_SIZE_75_MU;
323
324 if (vif == NL80211_IFTYPE_STATION)
325 c |= IEEE80211_HE_PHY_CAP6_PARTIAL_BANDWIDTH_DL_MUMIMO;
326
327 elem->phy_cap_info[6] |= c;
328
329 if (nss < 2)
330 return;
331
332 if (vif != NL80211_IFTYPE_AP)
333 return;
334
335 elem->phy_cap_info[3] |= IEEE80211_HE_PHY_CAP3_SU_BEAMFORMER;
336 elem->phy_cap_info[4] |= IEEE80211_HE_PHY_CAP4_MU_BEAMFORMER;
337
338 /* num_snd_dim */
> 339 c = (nss - 1) | (max_t(int, mcs->tx_mcs_160, 1) << 3);
340 elem->phy_cap_info[5] |= c;
341
342 c = IEEE80211_HE_PHY_CAP6_TRIG_SU_BEAMFORMER_FB |
343 IEEE80211_HE_PHY_CAP6_TRIG_MU_BEAMFORMER_FB;
344 elem->phy_cap_info[6] |= c;
345
346 /* the maximum cap is 4 x 3, (Nr, Nc) = (3, 2) */
347 elem->phy_cap_info[7] |= min_t(int, nss - 1, 2) << 3;
348 }
349

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

Attachment: .config.gz
Description: application/gzip