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-sunplus.c b/drivers/hid/hid-sunplus.c
index 438107d9f1b2..164ed568f6cf 100644
--- a/drivers/hid/hid-sunplus.c
+++ b/drivers/hid/hid-sunplus.c
@@ -22,16 +22,17 @@
 
 #include "hid-ids.h"
 
-static void sp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
-                unsigned int rsize)
+static __u8 *sp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+                unsigned int *rsize)
 {
-        if (rsize >= 107 && rdesc[104] == 0x26 && rdesc[105] == 0x80 &&
+        if (*rsize >= 107 && rdesc[104] == 0x26 && rdesc[105] == 0x80 &&
                         rdesc[106] == 0x03) {
                 dev_info(&hdev->dev, "fixing up Sunplus Wireless Desktop "
                                 "report descriptor\n");
                 rdesc[105] = rdesc[110] = 0x03;
                 rdesc[106] = rdesc[111] = 0x21;
         }
+        return rdesc;
 }
 
 #define sp_map_key_clear(c)     hid_map_usage_clear(hi, usage, bit, max, \