HID: Make lowlevel driver structs const

Nothing is nor should be modifying these structs so mark them as const.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: David Rheinsberg <david.rheinsberg@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/i2c-hid/i2c-hid-core.c

@@ -842,7 +842,7 @@ static void i2c_hid_close(struct hid_device *hid)
 	clear_bit(I2C_HID_STARTED, &ihid->flags);
 }
 
-static struct hid_ll_driver i2c_hid_ll_driver = {
+static const struct hid_ll_driver i2c_hid_ll_driver = {
 	.parse = i2c_hid_parse,
 	.start = i2c_hid_start,
 	.stop = i2c_hid_stop,

drivers/hid/uhid.c

@@ -387,7 +387,7 @@ static int uhid_hid_output_report(struct hid_device *hid, __u8 *buf,
 	return uhid_hid_output_raw(hid, buf, count, HID_OUTPUT_REPORT);
 }
 
-static struct hid_ll_driver uhid_hid_driver = {
+static const struct hid_ll_driver uhid_hid_driver = {
 	.start = uhid_hid_start,
 	.stop = uhid_hid_stop,
 	.open = uhid_hid_open,

drivers/hid/usbhid/hid-core.c

@@ -1318,7 +1318,7 @@ static bool usbhid_may_wakeup(struct hid_device *hid)
 	return device_may_wakeup(&dev->dev);
 }
 
-static struct hid_ll_driver usb_hid_driver = {
+static const struct hid_ll_driver usb_hid_driver = {
 	.parse = usbhid_parse,
 	.start = usbhid_start,
 	.stop = usbhid_stop,

include/linux/hid.h

@@ -596,7 +596,7 @@ struct hid_device {							/* device report descriptor */
 	struct device dev;						/* device */
 	struct hid_driver *driver;
 
-	struct hid_ll_driver *ll_driver;
+	const struct hid_ll_driver *ll_driver;
 	struct mutex ll_open_lock;
 	unsigned int ll_open_count;
 

net/bluetooth/hidp/core.c

@@ -739,7 +739,7 @@ static void hidp_stop(struct hid_device *hid)
 	hid->claimed = 0;
 }
 
-static struct hid_ll_driver hidp_hid_driver = {
+static const struct hid_ll_driver hidp_hid_driver = {
 	.parse = hidp_parse,
 	.start = hidp_start,
 	.stop = hidp_stop,