Commits on Jun 26, 2024

1. ASoC: SOF: Intel: hda: fix null deref on system suspend entry …

   When system enters suspend with an active stream, SOF core
   calls hw_params_upon_resume(). On Intel platforms with HDA DMA used
   to manage the link DMA, this leads to call chain of
   
      hda_dsp_set_hw_params_upon_resume()
    -> hda_dsp_dais_suspend()
    -> hda_dai_suspend()
    -> hda_ipc4_post_trigger()
   
   A bug is hit in hda_dai_suspend() as hda_link_dma_cleanup() is run first,
   which clears hext_stream->link_substream, and then hda_ipc4_post_trigger()
   is called with a NULL snd_pcm_substream pointer.
   
   Fixes: 2b009fa ("ASoC: SOF: Intel: hda: Unify DAI drv ops for IPC3 and IPC4")
   Link: thesofproject#5080
   Signed-off-by: Kai Vehmanen <[email protected]>

   

   kv2019i committed Jun 26, 2024
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