[PATCH 03/11] ASoC: SOF: Add helper macro to be used to get an IPC ops

[Peter Ujfalusi <peter.ujfalusi@linux.intel.com>]

In preparation to a case when the DSP is not used.
In this case the IPC communication itself has no meaning and we might
not even have sdev->ipc allocated at all.

The sof_ipc_get_ops() macro can be used to get a named IPC ops struct or
return NULL if the sdev->ipc is not allocated.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
---
 sound/soc/sof/sof-priv.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sound/soc/sof/sof-priv.h b/sound/soc/sof/sof-priv.h
index 6760fd895950..144906c4cb63 100644
--- a/sound/soc/sof/sof-priv.h
+++ b/sound/soc/sof/sof-priv.h
@@ -502,6 +502,10 @@ struct snd_sof_ipc {
 	const struct sof_ipc_ops *ops;
 };
 
+/* Helper to retrieve the IPC ops */
+#define sof_ipc_get_ops(sdev, ops_name)		\
+		(((sdev)->ipc && (sdev)->ipc->ops) ? (sdev)->ipc->ops->ops_name : NULL)
+
 /*
  * SOF Device Level.
  */
-- 
2.39.0