[PATCH v3 1/5] remoteproc: mtk_scp_ipi: Constify buffer passed to scp_ipi_send()

[Krzysztof Kozlowski]

scp_ipi_send() should only send the passed buffer, without modifying its
contents, so mark pointer 'buf' as pointer to const.

Acked-by: Mathieu Poirier <mathieu.poirier at linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski at oss.qualcomm.com>
---

Patch necessary for the further patches, please keep with the rest.
---
 drivers/remoteproc/mtk_scp_ipi.c   | 2 +-
 include/linux/remoteproc/mtk_scp.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/remoteproc/mtk_scp_ipi.c b/drivers/remoteproc/mtk_scp_ipi.c
index 7a37e273b3af..ee2f1121411f 100644
--- a/drivers/remoteproc/mtk_scp_ipi.c
+++ b/drivers/remoteproc/mtk_scp_ipi.c
@@ -156,7 +156,7 @@ EXPORT_SYMBOL_GPL(scp_ipi_unlock);
  *
  * Return: 0 if sending data successfully, -error on error.
  **/
-int scp_ipi_send(struct mtk_scp *scp, u32 id, void *buf, unsigned int len,
+int scp_ipi_send(struct mtk_scp *scp, u32 id, const void *buf, unsigned int len,
 		 unsigned int wait)
 {
 	struct mtk_share_obj __iomem *send_obj = scp->send_buf;
diff --git a/include/linux/remoteproc/mtk_scp.h b/include/linux/remoteproc/mtk_scp.h
index 344ff41c22c7..4070537d6542 100644
--- a/include/linux/remoteproc/mtk_scp.h
+++ b/include/linux/remoteproc/mtk_scp.h
@@ -58,7 +58,7 @@ int scp_ipi_register(struct mtk_scp *scp, u32 id, scp_ipi_handler_t handler,
 		     void *priv);
 void scp_ipi_unregister(struct mtk_scp *scp, u32 id);
 
-int scp_ipi_send(struct mtk_scp *scp, u32 id, void *buf, unsigned int len,
+int scp_ipi_send(struct mtk_scp *scp, u32 id, const void *buf, unsigned int len,
 		 unsigned int wait);
 
 unsigned int scp_get_vdec_hw_capa(struct mtk_scp *scp);

-- 
2.51.0