HID: allow resizing and replacing report descriptors
Update hid_driver's report_fixup prototype to allow changing report
descriptor size and/or returning completely different report descriptor.
Update existing usage accordingly.
This is to give more freedom in descriptor fixup and to allow having a whole
fixed descriptor in the code for the sake of readability.
Signed-off-by: Nikolai Kondrashov <spbnick@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-cherry.c b/drivers/hid/hid-cherry.c
index 24663a8..e880086 100644
--- a/drivers/hid/hid-cherry.c
+++ b/drivers/hid/hid-cherry.c
@@ -26,15 +26,16 @@
* Cherry Cymotion keyboard have an invalid HID report descriptor,
* that needs fixing before we can parse it.
*/
-static void ch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
- unsigned int rsize)
+static __u8 *ch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+ unsigned int *rsize)
{
- if (rsize >= 17 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {
+ if (*rsize >= 17 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {
dev_info(&hdev->dev, "fixing up Cherry Cymotion report "
"descriptor\n");
rdesc[11] = rdesc[16] = 0xff;
rdesc[12] = rdesc[17] = 0x03;
}
+ return rdesc;
}
#define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \