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ASoC: SOF: ipc4/intel: Add missing mutex_unlock()

Message ID 20230322181830.574635-1-jyri.sarha@linux.intel.com
State Accepted
Commit 935d31fdda2c69324b3eeb648a73fdedf4131474
Headers show
Series ASoC: SOF: ipc4/intel: Add missing mutex_unlock() | expand

Commit Message

Jyri Sarha March 22, 2023, 6:18 p.m. UTC 
There was a missing mutex_unlock() in sof_ipc4_widget_free()
use_chain_dma if-branch that caused a static analysis error. The
branch should not be used in a normal working configuration and if its
used its an indication of a bad topology. Add missing mutex_unlock()
and a warning print if the if-branch is taken, and another warning
print to a symmetric place in sof_ipc4_widget_setup().

Fixes: ca5ce0caa67fa9 ("ASoC: SOF: ipc4/intel: Add support for chained DMA")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/r/202303222050.dCw0fPCW-lkp@intel.com/
Signed-off-by: Jyri Sarha <jyri.sarha@linux.intel.com>
---
 sound/soc/sof/ipc4-topology.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)
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Patch

diff --git a/sound/soc/sof/ipc4-topology.c b/sound/soc/sof/ipc4-topology.c
index f1e1aed94da4..12775fcb6b54 100644
--- a/sound/soc/sof/ipc4-topology.c
+++ b/sound/soc/sof/ipc4-topology.c
@@ -1989,8 +1989,11 @@  static int sof_ipc4_widget_setup(struct snd_sof_dev *sdev, struct snd_sof_widget
 	case snd_soc_dapm_scheduler:
 		pipeline = swidget->private;
 
-		if (pipeline->use_chain_dma)
+		if (pipeline->use_chain_dma) {
+			dev_warn(sdev->dev, "use_chain_dma set for schduler %s",
+				 swidget->widget->name);
 			return 0;
+		}
 
 		dev_dbg(sdev->dev, "pipeline: %d memory pages: %d\n", swidget->pipeline_id,
 			pipeline->mem_usage);
@@ -2145,8 +2148,12 @@  static int sof_ipc4_widget_free(struct snd_sof_dev *sdev, struct snd_sof_widget
 		struct sof_ipc4_msg msg = {{ 0 }};
 		u32 header;
 
-		if (pipeline->use_chain_dma)
+		if (pipeline->use_chain_dma) {
+			dev_warn(sdev->dev, "use_chain_dma set for schduler %s",
+				 swidget->widget->name);
+			mutex_unlock(&ipc4_data->pipeline_state_mutex);
 			return 0;
+		}
 
 		header = SOF_IPC4_GLB_PIPE_INSTANCE_ID(swidget->instance_id);
 		header |= SOF_IPC4_MSG_TYPE_SET(SOF_IPC4_GLB_DELETE_PIPELINE);