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

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[ Upstream commit 9065693dcc13f287b9e4991f43aee70cf5538fdd ]

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: 2b009fa082 ("ASoC: SOF: Intel: hda: Unify DAI drv ops for IPC3 and IPC4")
Link: https://github.com/thesofproject/linux/issues/5080
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://patch.msgid.link/20240704085708.371414-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kai Vehmanen
2024-07-04 10:57:08 +02:00
committed by Greg Kroah-Hartman
parent 76ea8e13aa
commit 8246bbf818
1 changed files with 6 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
sound/soc/sof/intel/hda-dai.c
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@@ -534,12 +534,6 @@ static int hda_dai_suspend(struct hdac_bus *bus)
sdai = swidget->private;
ops = sdai->platform_private;
ret = hda_link_dma_cleanup(hext_stream->link_substream,
hext_stream,
cpu_dai);
if (ret < 0)
return ret;
/* for consistency with TRIGGER_SUSPEND */
if (ops->post_trigger) {
ret = ops->post_trigger(sdev, cpu_dai,
@@ -548,6 +542,12 @@ static int hda_dai_suspend(struct hdac_bus *bus)
if (ret < 0)
return ret;
}
ret = hda_link_dma_cleanup(hext_stream->link_substream,
hext_stream,
cpu_dai);
if (ret < 0)
return ret;
}
}