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-microsoft.c b/drivers/hid/hid-microsoft.c
index 359cc44..dc618c3 100644
--- a/drivers/hid/hid-microsoft.c
+++ b/drivers/hid/hid-microsoft.c
@@ -33,18 +33,19 @@
* Microsoft Wireless Desktop Receiver (Model 1028) has
* 'Usage Min/Max' where it ought to have 'Physical Min/Max'
*/
-static void ms_report_fixup(struct hid_device *hdev, __u8 *rdesc,
- unsigned int rsize)
+static __u8 *ms_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+ unsigned int *rsize)
{
unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
- if ((quirks & MS_RDESC) && rsize == 571 && rdesc[557] == 0x19 &&
+ if ((quirks & MS_RDESC) && *rsize == 571 && rdesc[557] == 0x19 &&
rdesc[559] == 0x29) {
dev_info(&hdev->dev, "fixing up Microsoft Wireless Receiver "
"Model 1028 report descriptor\n");
rdesc[557] = 0x35;
rdesc[559] = 0x45;
}
+ return rdesc;
}
#define ms_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \