'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
