Intel's kernel test robot found the following randconfig combination: SND_SOC_SOF=y SND_SOC_SOF_CLIENT=m In this the sof-client object is not going to be built into the snd-sof.o and we will have undefined references to the sof-client functions. Fixes: 6955d9512d0e ("ASoC: SOF: Introduce IPC SOF client support") Reported-by: kernel test robot <lkp@xxxxxxxxx> Signed-off-by: Peter Ujfalusi <Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>> --- Hi Mark, Pierre, Changes since v1: - fix author and SoB from gmail.com to linux.intel.com When the client support was added we did some permutation tests (at least I did) but missed this combination. It is a valid one for sure and the proper fix is via the Makefile. Sorry for mising this Regards, Peter sound/soc/sof/Makefile | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/sound/soc/sof/Makefile b/sound/soc/sof/Makefile index 4d31282c847d..a0459f06c68a 100644 --- a/sound/soc/sof/Makefile +++ b/sound/soc/sof/Makefile @@ -2,7 +2,9 @@ snd-sof-objs := core.o ops.o loader.o ipc.o pcm.o pm.o debug.o topology.o\ control.o trace.o iomem-utils.o sof-audio.o stream-ipc.o -snd-sof-$(CONFIG_SND_SOC_SOF_CLIENT) += sof-client.o +ifneq ($(CONFIG_SND_SOC_SOF_CLIENT),) +snd-sof-objs += sof-client.o +endif snd-sof-$(CONFIG_SND_SOC_SOF_COMPRESS) += compress.o -- 2.35.1