drivers/net/wireless/realtek/rtw88/rtw8821c.c:71:8: warning: type qualifiers ignored on function return type

kernel test robot
2020-08-10T14:56:27Z

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Hi Tzu-En,

First bad commit (maybe != root cause):

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: fc80c51fd4b23ec007e88d4c688f2cac1b8648e7
commit: f745eb9ca5bf823bc5c0f82a434cefb41c57844e rtw88: 8821c: Add 8821CE to Kconfig and Makefile
date: 4 weeks ago
config: alpha-randconfig-r036-20200810 (attached as .config)
compiler: alpha-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout f745eb9ca5bf823bc5c0f82a434cefb41c57844e
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha

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

All warnings (new ones prefixed by >>):

>> drivers/net/wireless/realtek/rtw88/rtw8821c.c:71:8: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
71 | static const u8 rtw8821c_get_swing_index(struct rtw_dev *rtwdev)
| ^~~~~

vim +71 drivers/net/wireless/realtek/rtw88/rtw8821c.c

3a4312828ce13e Tzu-En Huang 2020-06-03 70
3a4312828ce13e Tzu-En Huang 2020-06-03 @71 static const u8 rtw8821c_get_swing_index(struct rtw_dev *rtwdev)
3a4312828ce13e Tzu-En Huang 2020-06-03 72 {
3a4312828ce13e Tzu-En Huang 2020-06-03 73 u8 i = 0;
3a4312828ce13e Tzu-En Huang 2020-06-03 74 u32 swing, table_value;
3a4312828ce13e Tzu-En Huang 2020-06-03 75
3a4312828ce13e Tzu-En Huang 2020-06-03 76 swing = rtw_read32_mask(rtwdev, REG_TXSCALE_A, 0xffe00000);
3a4312828ce13e Tzu-En Huang 2020-06-03 77 for (i = 0; i < ARRAY_SIZE(rtw8821c_txscale_tbl); i++) {
3a4312828ce13e Tzu-En Huang 2020-06-03 78 table_value = rtw8821c_txscale_tbl[i];
3a4312828ce13e Tzu-En Huang 2020-06-03 79 if (swing == table_value)
3a4312828ce13e Tzu-En Huang 2020-06-03 80 break;
3a4312828ce13e Tzu-En Huang 2020-06-03 81 }
3a4312828ce13e Tzu-En Huang 2020-06-03 82
3a4312828ce13e Tzu-En Huang 2020-06-03 83 return i;
3a4312828ce13e Tzu-En Huang 2020-06-03 84 }
3a4312828ce13e Tzu-En Huang 2020-06-03 85

:::::: The code at line 71 was first introduced by commit
:::::: 3a4312828ce13e1645fd3af76e4314a2623b3361 rtw88: 8821c: add power tracking

:::::: TO: Tzu-En Huang <tehuang@realtek.com>
:::::: CC: Kalle Valo <kvalo@codeaurora.org>

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

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