fetch_item() does not modify the descriptor it operates on.
As a prerequisite for the constification of hid_driver::dev_rdesc,
mark the parameters and return value of fetch_item() as const.
Also adapt the variable types in the callers to match this
constification.
Signed-off-by: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
---
drivers/hid/hid-core.c | 12 ++++++------
include/linux/hid.h | 2 +-
2 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 0d2cbe491708..311069588321 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -723,7 +723,7 @@ static void hid_device_release(struct device *dev)
* items, though they are not used yet.
*/
-static u8 *fetch_item(__u8 *start, __u8 *end, struct hid_item *item)
+static const u8 *fetch_item(const __u8 *start, const __u8 *end, struct hid_item *item)
{
u8 b;
@@ -880,8 +880,8 @@ static int hid_scan_report(struct hid_device *hid)
{
struct hid_parser *parser;
struct hid_item item;
- __u8 *start = hid->dev_rdesc;
- __u8 *end = start + hid->dev_rsize;
+ const __u8 *start = hid->dev_rdesc;
+ const __u8 *end = start + hid->dev_rsize;
static int (*dispatch_type[])(struct hid_parser *parser,
struct hid_item *item) = {
hid_scan_main,
@@ -1204,10 +1204,10 @@ int hid_open_report(struct hid_device *device)
struct hid_parser *parser;
struct hid_item item;
unsigned int size;
- __u8 *start;
+ const __u8 *start;
__u8 *buf;
- __u8 *end;
- __u8 *next;
+ const __u8 *end;
+ const __u8 *next;
int ret;
int i;
static int (*dispatch_type[])(struct hid_parser *parser,
diff --git a/include/linux/hid.h b/include/linux/hid.h
index dda34d8cad19..502bbc6f078c 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -46,7 +46,7 @@ struct hid_item {
__s16 s16;
__u32 u32;
__s32 s32;
- __u8 *longdata;
+ const __u8 *longdata;
} data;
};
--
2.46.0
