Hi Vijendar, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on asoc/for-next] [also build test WARNING on v5.7-rc6 next-20200518] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Vijendar-Mukunda/Add-Renoir-ACP-... base: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next config: i386-allyesconfig (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: # save the attached .config to linux build tree make ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): sound/soc/amd/renoir/acp3x-pdm-dma.c: In function 'stop_pdm_dma': u32 pdm_enable, pdm_dma_enable, pdm_fifo_flush; ^~~~~~~~~~~~~~ vim +/pdm_fifo_flush +153 sound/soc/amd/renoir/acp3x-pdm-dma.c 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 150 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 151 static int stop_pdm_dma(void __iomem *acp_base) 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 152 { 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 @153 u32 pdm_enable, pdm_dma_enable, pdm_fifo_flush; 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 154 int timeout; 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 155 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 156 pdm_enable = 0x00; 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 157 pdm_dma_enable = 0x00; 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 158 pdm_fifo_flush = 0x00; 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 159 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 160 pdm_enable = rn_readl(acp_base + ACP_WOV_PDM_ENABLE); 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 161 pdm_dma_enable = rn_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE); 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 162 if (pdm_dma_enable & 0x01) { 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 163 pdm_dma_enable = 0x02; 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 164 rn_writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE); 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 165 pdm_dma_enable = 0x00; 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 166 timeout = 0; 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 167 while (++timeout < ACP_COUNTER) { 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 168 pdm_dma_enable = rn_readl(acp_base + 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 169 ACP_WOV_PDM_DMA_ENABLE); 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 170 if ((pdm_dma_enable & 0x02) == 0x00) 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 171 break; 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 172 udelay(DELAY_US); 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 173 } 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 174 if (timeout == ACP_COUNTER) 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 175 return -ETIMEDOUT; 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 176 } 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 177 if (pdm_enable == ACP_PDM_ENABLE) { 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 178 pdm_enable = ACP_PDM_DISABLE; 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 179 rn_writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE); 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 180 } 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 181 rn_writel(0x01, acp_base + ACP_WOV_PDM_FIFO_FLUSH); 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 182 return 0; 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 183 } 041ae75cda4ae70 Vijendar Mukunda 2020-05-19 184 :::::: The code at line 153 was first introduced by commit :::::: 041ae75cda4ae7035ab23ccf422dc5229871e720 ASoC: amd: add ACP PDM DMA driver dai ops :::::: TO: Vijendar Mukunda <Vijendar.Mukunda(a)amd.com&gt; :::::: CC: 0day robot <lkp(a)intel.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org