[PATCH] ASoC: SOF: mediatek: Constify struct mtk_adsp_ipc_ops

[Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>]

'struct mtk_adsp_ipc_ops' is not modified in these drivers.

Constifying this structure moves some data to a read-only section, so
increase overall security.

In order to do it, "struct mtk_adsp_ipc" also needs to be adjusted to this
new const qualifier.

On a x86_64, with allmodconfig:
Before:
======
   text	   data	    bss	    dec	    hex	filename
  15533	   2383	      0	  17916	   45fc	sound/soc/sof/mediatek/mt8195/mt8195.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
  15557	   2367	      0	  17924	   4604	sound/soc/sof/mediatek/mt8195/mt8195.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
---
 include/linux/firmware/mediatek/mtk-adsp-ipc.h | 2 +-
 sound/soc/sof/mediatek/mt8186/mt8186.c         | 2 +-
 sound/soc/sof/mediatek/mt8195/mt8195.c         | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/firmware/mediatek/mtk-adsp-ipc.h b/include/linux/firmware/mediatek/mtk-adsp-ipc.h
index 5b1d16fa3f56..6e86799a7dc4 100644
--- a/include/linux/firmware/mediatek/mtk-adsp-ipc.h
+++ b/include/linux/firmware/mediatek/mtk-adsp-ipc.h
@@ -40,7 +40,7 @@ struct mtk_adsp_chan {
 struct mtk_adsp_ipc {
 	struct mtk_adsp_chan chans[MTK_ADSP_MBOX_NUM];
 	struct device *dev;
-	struct mtk_adsp_ipc_ops *ops;
+	const struct mtk_adsp_ipc_ops *ops;
 	void *private_data;
 };
 
diff --git a/sound/soc/sof/mediatek/mt8186/mt8186.c b/sound/soc/sof/mediatek/mt8186/mt8186.c
index bea1b9d9ca28..74522400207e 100644
--- a/sound/soc/sof/mediatek/mt8186/mt8186.c
+++ b/sound/soc/sof/mediatek/mt8186/mt8186.c
@@ -82,7 +82,7 @@ static void mt8186_dsp_handle_request(struct mtk_adsp_ipc *ipc)
 	}
 }
 
-static struct mtk_adsp_ipc_ops dsp_ops = {
+static const struct mtk_adsp_ipc_ops dsp_ops = {
 	.handle_reply		= mt8186_dsp_handle_reply,
 	.handle_request		= mt8186_dsp_handle_request,
 };
diff --git a/sound/soc/sof/mediatek/mt8195/mt8195.c b/sound/soc/sof/mediatek/mt8195/mt8195.c
index 31dc98d1b1d8..24ae1d4959be 100644
--- a/sound/soc/sof/mediatek/mt8195/mt8195.c
+++ b/sound/soc/sof/mediatek/mt8195/mt8195.c
@@ -82,7 +82,7 @@ static void mt8195_dsp_handle_request(struct mtk_adsp_ipc *ipc)
 	}
 }
 
-static struct mtk_adsp_ipc_ops dsp_ops = {
+static const struct mtk_adsp_ipc_ops dsp_ops = {
 	.handle_reply		= mt8195_dsp_handle_reply,
 	.handle_request		= mt8195_dsp_handle_request,
 };
-- 
2.45.2