[kbuild-all] Re: [kbuild] Re: [PATCH v2 1/2] mt76: mt7915: add missing capabilities for DBDC

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&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; 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.