2 files changed, 5 insertions, 0 deletions

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index f5004e2ca0c5..b5974cd45968 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -92,6 +92,7 @@ EXPORT_SYMBOL_GPL(hid_register_report);
 static struct hid_field *hid_register_field(struct hid_report *report, unsigned usages, unsigned values)
 {
         struct hid_field *field;
+        int i;
 
         if (report->maxfield == HID_MAX_FIELDS) {
                 hid_err(report->device, "too many fields in report\n");
@@ -110,6 +111,9 @@ static struct hid_field *hid_register_field(struct hid_report *report, unsigned
         field->value = (s32 *)(field->usage + usages);
         field->report = report;
 
+        for (i = 0; i < usages; i++)
+                field->usage[i].usage_index = i;
+
         return field;
 }
 
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 4161bf2c0b5b..d2c42dd222c1 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -342,6 +342,7 @@ struct hid_collection {
 struct hid_usage {
         unsigned  hid;                  /* hid usage code */
         unsigned  collection_index;     /* index into collection array */
+        unsigned  usage_index;          /* index into usage array */
         /* hidinput data */
         __u16     code;                 /* input driver code */
         __u8      type;                 /* input driver type */