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HID: constify params and return value of fetch_item()

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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@weissschuh.net>
Link: https://patch.msgid.link/20240803-hid-const-fixup-v2-4-f53d7a7b29d8@weissschuh.net
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
This commit is contained in:
Thomas Weißschuh 2024-08-03 14:34:20 +02:00 committed by Benjamin Tissoires
parent 24ddd0d7de
commit 80cfb508f3
2 changed files with 7 additions and 7 deletions
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12
drivers/hid/hid-core.c
View File

@ -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,

2
include/linux/hid.h
View File

@ -46,7 +46,7 @@ struct hid_item {
__s16 s16;
__u32 u32;
__s32 s32;
__u8 *longdata;
const __u8 *longdata;
} data;
};