[PATCH v8 2/9] mailbox: Make mbox_chan_ops const

[abrestic@chromium.org (Andrew Bresticker)]

The mailbox controller's channel ops ought to be read-only.  Update
all the mailbox drivers to make their mbox_chan_ops const as well.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Cc: Jassi Brar <jassisinghbrar@gmail.com>
Cc: Suman Anna <s-anna@ti.com>
Cc: Ashwin Chaugule <ashwin.chaugule@linaro.org>
Cc: Ley Foon Tan <lftan@altera.com>
---
Changes from v7:
 - Constify all drivers' mbox_chan_ops.
No changes from v5/v6.
New for v5.
---
 drivers/mailbox/arm_mhu.c          | 2 +-
 drivers/mailbox/mailbox-altera.c   | 2 +-
 drivers/mailbox/omap-mailbox.c     | 2 +-
 drivers/mailbox/pcc.c              | 2 +-
 include/linux/mailbox_controller.h | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/mailbox/arm_mhu.c b/drivers/mailbox/arm_mhu.c
index ac693c6..d9e99f9 100644
--- a/drivers/mailbox/arm_mhu.c
+++ b/drivers/mailbox/arm_mhu.c
@@ -110,7 +110,7 @@ static void mhu_shutdown(struct mbox_chan *chan)
 	free_irq(mlink->irq, chan);
 }
 
-static struct mbox_chan_ops mhu_ops = {
+static const struct mbox_chan_ops mhu_ops = {
 	.send_data = mhu_send_data,
 	.startup = mhu_startup,
 	.shutdown = mhu_shutdown,
diff --git a/drivers/mailbox/mailbox-altera.c b/drivers/mailbox/mailbox-altera.c
index a266265..bb682c9 100644
--- a/drivers/mailbox/mailbox-altera.c
+++ b/drivers/mailbox/mailbox-altera.c
@@ -285,7 +285,7 @@ static void altera_mbox_shutdown(struct mbox_chan *chan)
 	}
 }
 
-static struct mbox_chan_ops altera_mbox_ops = {
+static const struct mbox_chan_ops altera_mbox_ops = {
 	.send_data = altera_mbox_send_data,
 	.startup = altera_mbox_startup,
 	.shutdown = altera_mbox_shutdown,
diff --git a/drivers/mailbox/omap-mailbox.c b/drivers/mailbox/omap-mailbox.c
index 0f332c1..03f8545 100644
--- a/drivers/mailbox/omap-mailbox.c
+++ b/drivers/mailbox/omap-mailbox.c
@@ -604,7 +604,7 @@ static int omap_mbox_chan_send_data(struct mbox_chan *chan, void *data)
 	return ret;
 }
 
-static struct mbox_chan_ops omap_mbox_chan_ops = {
+static const struct mbox_chan_ops omap_mbox_chan_ops = {
 	.startup        = omap_mbox_chan_startup,
 	.send_data      = omap_mbox_chan_send_data,
 	.shutdown       = omap_mbox_chan_shutdown,
diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c
index 7e91d68..26d121d 100644
--- a/drivers/mailbox/pcc.c
+++ b/drivers/mailbox/pcc.c
@@ -198,7 +198,7 @@ static int pcc_send_data(struct mbox_chan *chan, void *data)
 	return 0;
 }
 
-static struct mbox_chan_ops pcc_chan_ops = {
+static const struct mbox_chan_ops pcc_chan_ops = {
 	.send_data = pcc_send_data,
 };
 
diff --git a/include/linux/mailbox_controller.h b/include/linux/mailbox_controller.h
index d4cf96f..68c4245 100644
--- a/include/linux/mailbox_controller.h
+++ b/include/linux/mailbox_controller.h
@@ -72,7 +72,7 @@ struct mbox_chan_ops {
  */
 struct mbox_controller {
 	struct device *dev;
-	struct mbox_chan_ops *ops;
+	const struct mbox_chan_ops *ops;
 	struct mbox_chan *chans;
 	int num_chans;
 	bool txdone_irq;
-- 
2.2.0.rc0.207.ga3a616c