ASoC: SOF: ipc4-topology: Allocate ref_params on stack

Currently the compiler (clang 19.1.7) is not happy about the size of
the stack frame in sof_ipc4_prepare_copier_module:

sound/soc/sof/ipc4-topology.c:1800:1: error: stack frame size (1288) exceeds limit (1024) in 'sof_ipc4_prepare_copier_module' [-Werror,-Wframe-larger-than]
 1800 | sof_ipc4_prepare_copier_module(struct snd_sof_widget *swidget,
      | ^

Work around this by allocating ref_params on stack, as it looks the biggest
variable on stack right now.

Note, this only happens when compile for 32-bit machines (x86_32 in my case).

Signed-off-by: Andy Shevchenko <[email protected]>
Acked-by: Peter Ujfalusi <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: andy-shev

sound/soc/sof/ipc4-topology.c

@@ -7,6 +7,7 @@
 //
 //
 #include <linux/bitfield.h>
+#include <linux/cleanup.h>
 #include <uapi/sound/sof/tokens.h>
 #include <sound/pcm_params.h>
 #include <sound/sof/ext_manifest4.h>
@@ -1807,8 +1808,8 @@ sof_ipc4_prepare_copier_module(struct snd_sof_widget *swidget,
 	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
 	struct sof_ipc4_copier_data *copier_data;
 	int input_fmt_index, output_fmt_index;
-	struct snd_pcm_hw_params ref_params;
 	struct sof_ipc4_copier *ipc4_copier;
+	struct snd_pcm_hw_params *ref_params __free(kfree) = NULL;
 	struct snd_sof_dai *dai;
 	u32 gtw_cfg_config_length;
 	u32 dma_config_tlv_size = 0;
@@ -1885,9 +1886,11 @@ sof_ipc4_prepare_copier_module(struct snd_sof_widget *swidget,
 		 * for capture.
 		 */
 		if (dir == SNDRV_PCM_STREAM_PLAYBACK)
-			ref_params = *fe_params;
+			ref_params = kmemdup(fe_params, sizeof(*ref_params), GFP_KERNEL);
 		else
-			ref_params = *pipeline_params;
+			ref_params = kmemdup(pipeline_params, sizeof(*ref_params), GFP_KERNEL);
+		if (!ref_params)
+			return -ENOMEM;
 
 		copier_data->gtw_cfg.node_id &= ~SOF_IPC4_NODE_INDEX_MASK;
 		copier_data->gtw_cfg.node_id |=
@@ -1924,8 +1927,11 @@ sof_ipc4_prepare_copier_module(struct snd_sof_widget *swidget,
 		 * In case of capture the ref_params returned will be used to
 		 * find the input configuration of the copier.
 		 */
-		ref_params = *fe_params;
-		ret = sof_ipc4_prepare_dai_copier(sdev, dai, &ref_params, dir);
+		ref_params = kmemdup(fe_params, sizeof(*ref_params), GFP_KERNEL);
+		if (!ref_params)
+			return -ENOMEM;
+
+		ret = sof_ipc4_prepare_dai_copier(sdev, dai, ref_params, dir);
 		if (ret < 0)
 			return ret;
 
@@ -1934,7 +1940,7 @@ sof_ipc4_prepare_copier_module(struct snd_sof_widget *swidget,
 		 * input configuration of the copier.
 		 */
 		if (dir == SNDRV_PCM_STREAM_PLAYBACK)
-			ref_params = *pipeline_params;
+			memcpy(ref_params, pipeline_params, sizeof(*ref_params));
 
 		break;
 	}
@@ -1946,7 +1952,10 @@ sof_ipc4_prepare_copier_module(struct snd_sof_widget *swidget,
 		ipc4_copier = (struct sof_ipc4_copier *)swidget->private;
 		copier_data = &ipc4_copier->data;
 		available_fmt = &ipc4_copier->available_fmt;
-		ref_params = *pipeline_params;
+
+		ref_params = kmemdup(pipeline_params, sizeof(*ref_params), GFP_KERNEL);
+		if (!ref_params)
+			return -ENOMEM;
 
 		break;
 	}
@@ -1959,7 +1968,7 @@ sof_ipc4_prepare_copier_module(struct snd_sof_widget *swidget,
 	/* set input and output audio formats */
 	input_fmt_index = sof_ipc4_init_input_audio_fmt(sdev, swidget,
 							&copier_data->base_config,
-							&ref_params, available_fmt);
+							ref_params, available_fmt);
 	if (input_fmt_index < 0)
 		return input_fmt_index;