Hi Zhen, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on wireless-drivers-next/master] [also build test WARNING on wireless-drivers/master v5.13-rc1 next-20210510] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Zhen-Lei/b43-phy_n-Delete-some-u... base: https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-ne... master config: x86_64-randconfig-s022-20210510 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/0a34ec34888436b132760d1f4f9aa7b0e... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Zhen-Lei/b43-phy_n-Delete-some-useless-empty-code/20210510-225502 git checkout 0a34ec34888436b132760d1f4f9aa7b0e8f84488 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/net/wireless/broadcom/b43/phy_n.c: In function 'b43_nphy_spur_workaround': 4597 | u32 noise[2] = { 0x3FF, 0x3FF }; | ^~~~~ 4596 | int tone[2] = { 57, 58 }; | ^~~~ vim +/noise +4597 drivers/net/wireless/broadcom/b43/phy_n.c 90b9738d85395d drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-01-15 4589 2d96c1ed4bab52 drivers/net/wireless/broadcom/b43/phy_n.c Alexander A. Klimov 2020-07-19 4590 /* https://bcm-v4.sipsolutions.net/802.11/PHY/N/SpurWar */ 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4591 static void b43_nphy_spur_workaround(struct b43_wldev *dev) 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4592 { 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4593 struct b43_phy_n *nphy = dev->phy.n; 90b9738d85395d drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-01-15 4594 204a665ba390bc drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-10-14 4595 u8 channel = dev->phy.channel; 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 @4596 int tone[2] = { 57, 58 }; 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 @4597 u32 noise[2] = { 0x3FF, 0x3FF }; 90b9738d85395d drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-01-15 4598 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4599 B43_WARN_ON(dev->phy.rev < 3); 90b9738d85395d drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-01-15 4600 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4601 if (nphy->hang_avoid) 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4602 b43_nphy_stay_in_carrier_search(dev, 1); 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4603 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4604 if (nphy->aband_spurwar_en) { 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4605 if (channel == 54) { 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4606 tone[0] = 0x20; 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4607 noise[0] = 0x25F; 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4608 } else if (channel == 38 || channel == 102 || channel == 118) { 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4609 if (0 /* FIXME */) { 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4610 tone[0] = 0x20; 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4611 noise[0] = 0x21F; 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4612 } else { 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4613 tone[0] = 0; 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4614 noise[0] = 0; 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4615 } 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4616 } else if (channel == 134) { 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4617 tone[0] = 0x20; 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4618 noise[0] = 0x21F; 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4619 } else if (channel == 151) { 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4620 tone[0] = 0x10; 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4621 noise[0] = 0x23F; 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4622 } else if (channel == 153 || channel == 161) { 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4623 tone[0] = 0x30; 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4624 noise[0] = 0x23F; 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4625 } else { 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4626 tone[0] = 0; 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4627 noise[0] = 0; 90b9738d85395d drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-01-15 4628 } 5ae6c8a696cdae drivers/net/wireless/broadcom/b43/phy_n.c Lee Jones 2020-08-14 4629 } 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4630 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4631 if (nphy->hang_avoid) 9442e5b58edb4a drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-02-04 4632 b43_nphy_stay_in_carrier_search(dev, 0); 90b9738d85395d drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-01-15 4633 } 90b9738d85395d drivers/net/wireless/b43/phy_n.c Rafał Miłecki 2010-01-15 4634 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org