GPR bus driver calls each GPR client callback with pointer to the GPR
response packet.  The callbacks are not suppose to modify that response
packet, so make it a pointer to const to document that expectation
explicitly.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
---
 include/linux/soc/qcom/apr.h | 2 +-
 sound/soc/qcom/qdsp6/q6apm.c | 8 ++++----
 sound/soc/qcom/qdsp6/q6prm.c | 4 ++--
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/linux/soc/qcom/apr.h b/include/linux/soc/qcom/apr.h
index b16530f319ad..6e1b1202e818 100644
--- a/include/linux/soc/qcom/apr.h
+++ b/include/linux/soc/qcom/apr.h
@@ -122,7 +122,7 @@ struct gpr_ibasic_rsp_accepted_t {
 #define APR_SVC_MAJOR_VERSION(v)	((v >> 16) & 0xFF)
 #define APR_SVC_MINOR_VERSION(v)	(v & 0xFF)
 
-typedef int (*gpr_port_cb) (struct gpr_resp_pkt *d, void *priv, int op);
+typedef int (*gpr_port_cb) (const struct gpr_resp_pkt *d, void *priv, int op);
 struct packet_router;
 struct pkt_router_svc {
 	struct device *dev;
diff --git a/sound/soc/qcom/qdsp6/q6apm.c b/sound/soc/qcom/qdsp6/q6apm.c
index 94cc6376a367..cec135c53b99 100644
--- a/sound/soc/qcom/qdsp6/q6apm.c
+++ b/sound/soc/qcom/qdsp6/q6apm.c
@@ -487,14 +487,14 @@ int q6apm_get_hw_pointer(struct q6apm_graph *graph, int dir)
 }
 EXPORT_SYMBOL_GPL(q6apm_get_hw_pointer);
 
-static int graph_callback(struct gpr_resp_pkt *data, void *priv, int op)
+static int graph_callback(const struct gpr_resp_pkt *data, void *priv, int op)
 {
 	struct data_cmd_rsp_rd_sh_mem_ep_data_buffer_done_v2 *rd_done;
 	struct data_cmd_rsp_wr_sh_mem_ep_data_buffer_done_v2 *done;
 	struct apm_cmd_rsp_shared_mem_map_regions *rsp;
 	struct gpr_ibasic_rsp_result_t *result;
 	struct q6apm_graph *graph = priv;
-	struct gpr_hdr *hdr = &data->hdr;
+	const struct gpr_hdr *hdr = &data->hdr;
 	struct device *dev = graph->dev;
 	uint32_t client_event;
 	phys_addr_t phys;
@@ -761,13 +761,13 @@ struct audioreach_module *q6apm_find_module_by_mid(struct q6apm_graph *graph, ui
 
 }
 
-static int apm_callback(struct gpr_resp_pkt *data, void *priv, int op)
+static int apm_callback(const struct gpr_resp_pkt *data, void *priv, int op)
 {
 	gpr_device_t *gdev = priv;
 	struct q6apm *apm = dev_get_drvdata(&gdev->dev);
 	struct device *dev = &gdev->dev;
 	struct gpr_ibasic_rsp_result_t *result;
-	struct gpr_hdr *hdr = &data->hdr;
+	const struct gpr_hdr *hdr = &data->hdr;
 
 	result = data->payload;
 
diff --git a/sound/soc/qcom/qdsp6/q6prm.c b/sound/soc/qcom/qdsp6/q6prm.c
index 0b8fad0bc832..eaec6d211cf8 100644
--- a/sound/soc/qcom/qdsp6/q6prm.c
+++ b/sound/soc/qcom/qdsp6/q6prm.c
@@ -175,12 +175,12 @@ int q6prm_set_lpass_clock(struct device *dev, int clk_id, int clk_attr, int clk_
 }
 EXPORT_SYMBOL_GPL(q6prm_set_lpass_clock);
 
-static int prm_callback(struct gpr_resp_pkt *data, void *priv, int op)
+static int prm_callback(const struct gpr_resp_pkt *data, void *priv, int op)
 {
 	gpr_device_t *gdev = priv;
 	struct q6prm *prm = dev_get_drvdata(&gdev->dev);
 	struct gpr_ibasic_rsp_result_t *result;
-	struct gpr_hdr *hdr = &data->hdr;
+	const struct gpr_hdr *hdr = &data->hdr;
 
 	switch (hdr->opcode) {
 	case PRM_CMD_RSP_REQUEST_HW_RSC:

-- 
2.48.1