Hi Daniel, FYI, the error/warning still remains. tree: https://github.com/Freescale/linux-fslc 5.10-2.1.x-imx head: cdf10f101ab7e0112a285ab86e1a62d80e7d2104 commit: 153af17b6a39176b294835304ae46e5234951a91 [9404/15264] LF-3774-3 ASoC: SOF: Fix sof_ipc_msg_data for compress streams config: x86_64-randconfig-a015-20211115 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project fbe72e41b99dc7994daac300d208a955be3e4a0a) 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 # https://github.com/Freescale/linux-fslc/commit/153af17b6a39176b294835304a... git remote add freescale-fslc https://github.com/Freescale/linux-fslc git fetch --no-tags freescale-fslc 5.10-2.1.x-imx git checkout 153af17b6a39176b294835304ae46e5234951a91 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross 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 >>): if (substream) { ^~~~~~~~~ sound/soc/sof/ipc-stream.c:50:7: note: uninitialized use occurs here if (pstream || sstream) ^~~~~~~ sound/soc/sof/ipc-stream.c:42:3: note: remove the 'if' if its condition is always true if (substream) { ^~~~~~~~~~~~~~~ sound/soc/sof/ipc-stream.c:38:33: note: initialize the variable 'pstream' to silence this warning struct sof_pcm_stream *pstream; ^ = NULL 1 warning generated. vim +42 sound/soc/sof/ipc-stream.c 27 28 /* Mailbox-based Intel IPC implementation */ 29 void sof_ipc_msg_data(struct snd_sof_dev *sdev, 30 struct snd_sof_pcm_stream *sps, 31 void *p, size_t sz) 32 { 33 if (!sps || !sdev->stream_box.size) { 34 sof_mailbox_read(sdev, sdev->dsp_box.offset, p, sz); 35 } else { 36 struct snd_pcm_substream *substream = sps->substream; 37 struct snd_compr_stream *cstream = sps->cstream; 38 struct sof_pcm_stream *pstream; 39 struct sof_compr_stream *sstream; 40 size_t posn_offset; 41 43 pstream = substream->runtime->private_data; 44 posn_offset = pstream->posn_offset; 45 } else { 46 sstream = cstream->runtime->private_data; 47 posn_offset = sstream->posn_offset; 48 } 49 /* The stream might already be closed */ 50 if (pstream || sstream) 51 sof_mailbox_read(sdev, posn_offset, p, sz); 52 } 53 } 54 EXPORT_SYMBOL(sof_ipc_msg_data); 55 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org