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>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/hid/hid-kye.c b/drivers/hid/hid-kye.c
index f8871712b7b5..817247ee006c 100644
--- a/drivers/hid/hid-kye.c
+++ b/drivers/hid/hid-kye.c
@@ -23,10 +23,10 @@
  *   - report size 8 count 1 must be size 1 count 8 for button bitfield
  *   - change the button usage range to 4-7 for the extra buttons
  */
-static void kye_report_fixup(struct hid_device *hdev, __u8 *rdesc,
-                unsigned int rsize)
+static __u8 *kye_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+                unsigned int *rsize)
 {
-        if (rsize >= 74 &&
+        if (*rsize >= 74 &&
                 rdesc[61] == 0x05 && rdesc[62] == 0x08 &&
                 rdesc[63] == 0x19 && rdesc[64] == 0x08 &&
                 rdesc[65] == 0x29 && rdesc[66] == 0x0f &&
@@ -40,6 +40,7 @@ static void kye_report_fixup(struct hid_device *hdev, __u8 *rdesc,
                 rdesc[72] = 0x01;
                 rdesc[74] = 0x08;
         }
+        return rdesc;
 }
 
 static const struct hid_device_id kye_devices[] = {