7:30 p.m.
Hi Ryder,
url:
https://github.com/0day-ci/linux/commits/Ryder-Lee/mt76-mt7915-add-missin...
base: https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-ne...
master
config: x86_64-randconfig-m001-20210309 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com>
smatch warnings:
drivers/net/wireless/mediatek/mt76/mt7915/init.c:353 mt7915_set_stream_vht_txbf_caps()
error: potentially dereferencing uninitialized 'cap'.
vim +/cap +353 drivers/net/wireless/mediatek/mt76/mt7915/init.c
00b2e16e006390 Ryder Lee 2020-05-12 344 void mt7915_set_stream_vht_txbf_caps(struct
mt7915_phy *phy)
00b2e16e006390 Ryder Lee 2020-05-12 345 {
50a6fe79623e22 Ryder Lee 2021-02-25 346 int nss;
50a6fe79623e22 Ryder Lee 2021-02-25 347 u32 *cap;
50a6fe79623e22 Ryder Lee 2021-02-25 348
50a6fe79623e22 Ryder Lee 2021-02-25 349 if (!phy->mt76->cap.has_5ghz)
50a6fe79623e22 Ryder Lee 2021-02-25 350 return;
50a6fe79623e22 Ryder Lee 2021-02-25 351
50a6fe79623e22 Ryder Lee 2021-02-25 352 nss = hweight8(phy->mt76->chainmask);
50a6fe79623e22 Ryder Lee 2021-02-25 @353 *cap =
&phy->mt76->sband_5g.sband.vht_cap.cap;
^^^^
"cap" isn't initialized.
00b2e16e006390 Ryder Lee 2020-05-12 354
00b2e16e006390 Ryder Lee 2020-05-12 355 *cap |= IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
|
00b2e16e006390 Ryder Lee 2020-05-12 356 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE |
00b2e16e006390 Ryder Lee 2020-05-12 357 (3 <<
IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT);
00b2e16e006390 Ryder Lee 2020-05-12 358
00b2e16e006390 Ryder Lee 2020-05-12 359 *cap &=
~(IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK |
00b2e16e006390 Ryder Lee 2020-05-12 360 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
00b2e16e006390 Ryder Lee 2020-05-12 361 IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE);
00b2e16e006390 Ryder Lee 2020-05-12 362
00b2e16e006390 Ryder Lee 2020-05-12 363 if (nss < 2)
00b2e16e006390 Ryder Lee 2020-05-12 364 return;
00b2e16e006390 Ryder Lee 2020-05-12 365
00b2e16e006390 Ryder Lee 2020-05-12 366 *cap |= IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
|
00b2e16e006390 Ryder Lee 2020-05-12 367 IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE |
00b2e16e006390 Ryder Lee 2020-05-12 368
FIELD_PREP(IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK,
00b2e16e006390 Ryder Lee 2020-05-12 369 nss - 1);
00b2e16e006390 Ryder Lee 2020-05-12 370 }
---
0-DAY CI Kernel Test Service, Intel Corporation
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