substreams, like the internal ones, might not have ops set. Check it, before looking at substream->ops->mmap. Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@xxxxxxxxxxxxx> --- sound/core/pcm_native.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 54e0eab2a57e..cb0164d55593 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -246,7 +246,7 @@ static bool hw_support_mmap(struct snd_pcm_substream *substream) if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP)) return false; - if (substream->ops->mmap || + if ((substream->ops && substream->ops->mmap) || (substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_DEV && substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_DEV_UC)) return true; -- 2.27.0
