Hi Vitaly, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on sound/for-next] [also build test WARNING on next-20210315] [cannot apply to v5.12-rc3] [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/Vitaly-Rodionov/ALSA-hda-cirrus-... base: https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-next config: i386-randconfig-s002-20210315 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-277-gc089cd2d-dirty # https://github.com/0day-ci/linux/commit/649ba4016100c8793c314c9dd5213ea91... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Vitaly-Rodionov/ALSA-hda-cirrus-Make-CS8409-driver-more-generic-by-using-fixups/20210316-010109 git checkout 649ba4016100c8793c314c9dd5213ea910a70ffd # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 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 >>): vim +1600 sound/pci/hda/patch_cirrus.c 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1584 649ba4016100c8 Stefan Binding 2021-03-15 1585 /** 649ba4016100c8 Stefan Binding 2021-03-15 1586 * cs8409_i2c_read - CS8409 I2C Write. 649ba4016100c8 Stefan Binding 2021-03-15 1587 * @codec: the codec instance 649ba4016100c8 Stefan Binding 2021-03-15 1588 * @i2c_address: I2C Address 649ba4016100c8 Stefan Binding 2021-03-15 1589 * @i2c_reg: Register to write to 649ba4016100c8 Stefan Binding 2021-03-15 1590 * @i2c_data: Data to write 649ba4016100c8 Stefan Binding 2021-03-15 1591 * @paged: Is a paged transaction 649ba4016100c8 Stefan Binding 2021-03-15 1592 * 649ba4016100c8 Stefan Binding 2021-03-15 1593 * CS8409 I2C Write. 649ba4016100c8 Stefan Binding 2021-03-15 1594 * Returns negative on error, otherwise returns 0. 649ba4016100c8 Stefan Binding 2021-03-15 1595 */ 649ba4016100c8 Stefan Binding 2021-03-15 1596 static int cs8409_i2c_write(struct hda_codec *codec, 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1597 unsigned int i2c_address, unsigned int i2c_reg, 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1598 unsigned int i2c_data, 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1599 unsigned int paged) 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 @1600 { 649ba4016100c8 Stefan Binding 2021-03-15 1601 unsigned int i2c_reg_data; 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1602 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1603 cs8409_enable_i2c_clock(codec, 1); 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1604 cs_vendor_coef_set(codec, CIR_I2C_ADDR, i2c_address); 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1605 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1606 if (paged) { 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1607 cs_vendor_coef_set(codec, CIR_I2C_QWRITE, i2c_reg >> 8); 649ba4016100c8 Stefan Binding 2021-03-15 1608 if (cs8409_i2c_wait_complete(codec) < 0) { 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1609 codec_err(codec, 649ba4016100c8 Stefan Binding 2021-03-15 1610 "%s() Paged Transaction Failed 0x%02x : 0x%04x\n", 649ba4016100c8 Stefan Binding 2021-03-15 1611 __func__, i2c_address, i2c_reg); 649ba4016100c8 Stefan Binding 2021-03-15 1612 return -EIO; 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1613 } 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1614 } 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1615 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1616 i2c_reg_data = ((i2c_reg << 8) & 0x0ff00) | (i2c_data & 0x0ff); 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1617 cs_vendor_coef_set(codec, CIR_I2C_QWRITE, i2c_reg_data); 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1618 649ba4016100c8 Stefan Binding 2021-03-15 1619 if (cs8409_i2c_wait_complete(codec) < 0) { 649ba4016100c8 Stefan Binding 2021-03-15 1620 codec_err(codec, "%s() Transaction Failed 0x%02x : 0x%04x\n", 649ba4016100c8 Stefan Binding 2021-03-15 1621 __func__, i2c_address, i2c_reg); 649ba4016100c8 Stefan Binding 2021-03-15 1622 return -EIO; 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1623 } 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1624 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1625 cs8409_enable_i2c_clock(codec, 0); 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1626 649ba4016100c8 Stefan Binding 2021-03-15 1627 return 0; 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1628 } 6cc7e93f46a5ce Vitaly Rodionov 2021-03-06 1629 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org