[PATCH 345/379][SRU][OEM-5.6] bus: mhi: core: Add const qualifier to MHI config information

[You-Sheng Yang]

From: Hemant Kumar <hemantk at codeaurora.org>

BugLink: https://bugs.launchpad.net/bugs/1879633

MHI channel, event and controller config data needs to be
treated read only information. Add const qualifier to make
sure config information passed by MHI controller is not
modified by MHI core driver.

Suggested-by: Kalle Valo <kvalo at codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam at linaro.org>
Signed-off-by: Hemant Kumar <hemantk at codeaurora.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam at linaro.org>
Link: https://lore.kernel.org/r/20200929175218.8178-12-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
(cherry picked from commit f38173a731cae380885e843dace21c8dc4198285)
Signed-off-by: You-Sheng Yang <vicamo.yang at canonical.com>
---
 drivers/bus/mhi/core/init.c | 12 ++++++------
 include/linux/mhi.h         |  6 +++---
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
index f69a2f3d039d..d23293876be8 100644
--- a/drivers/bus/mhi/core/init.c
+++ b/drivers/bus/mhi/core/init.c
@@ -562,10 +562,10 @@ int mhi_init_chan_ctxt(struct mhi_controller *mhi_cntrl,
 }
 
 static int parse_ev_cfg(struct mhi_controller *mhi_cntrl,
-			struct mhi_controller_config *config)
+			const struct mhi_controller_config *config)
 {
 	struct mhi_event *mhi_event;
-	struct mhi_event_config *event_cfg;
+	const struct mhi_event_config *event_cfg;
 	struct device *dev = &mhi_cntrl->mhi_dev->dev;
 	int i, num;
 
@@ -648,9 +648,9 @@ static int parse_ev_cfg(struct mhi_controller *mhi_cntrl,
 }
 
 static int parse_ch_cfg(struct mhi_controller *mhi_cntrl,
-			struct mhi_controller_config *config)
+			const struct mhi_controller_config *config)
 {
-	struct mhi_channel_config *ch_cfg;
+	const struct mhi_channel_config *ch_cfg;
 	struct device *dev = &mhi_cntrl->mhi_dev->dev;
 	int i;
 	u32 chan;
@@ -766,7 +766,7 @@ static int parse_ch_cfg(struct mhi_controller *mhi_cntrl,
 }
 
 static int parse_config(struct mhi_controller *mhi_cntrl,
-			struct mhi_controller_config *config)
+			const struct mhi_controller_config *config)
 {
 	int ret;
 
@@ -803,7 +803,7 @@ static int parse_config(struct mhi_controller *mhi_cntrl,
 }
 
 int mhi_register_controller(struct mhi_controller *mhi_cntrl,
-			    struct mhi_controller_config *config)
+			    const struct mhi_controller_config *config)
 {
 	struct mhi_event *mhi_event;
 	struct mhi_chan *mhi_chan;
diff --git a/include/linux/mhi.h b/include/linux/mhi.h
index 92c3c1e441e9..2586287ac8cd 100644
--- a/include/linux/mhi.h
+++ b/include/linux/mhi.h
@@ -278,9 +278,9 @@ struct mhi_controller_config {
 	u32 timeout_ms;
 	u32 buf_len;
 	u32 num_channels;
-	struct mhi_channel_config *ch_cfg;
+	const struct mhi_channel_config *ch_cfg;
 	u32 num_events;
-	struct mhi_event_config *event_cfg;
+	const struct mhi_event_config *event_cfg;
 	bool use_bounce_buf;
 	bool m2_no_db;
 };
@@ -543,7 +543,7 @@ void mhi_free_controller(struct mhi_controller *mhi_cntrl);
  * @config: Configuration to use for the controller
  */
 int mhi_register_controller(struct mhi_controller *mhi_cntrl,
-			    struct mhi_controller_config *config);
+			const struct mhi_controller_config *config);
 
 /**
  * mhi_unregister_controller - Unregister MHI controller
-- 
2.29.2