Input: hiddev - fix off-by-one for num_values in uref_multi requests
Found this when working with a HAPP UGCI device. It has a usage with 7
indexes. I could read them all one at a time, but using a multiref it
would only allow me to read the first 6. The patch below fixed it.
Signed-off-by: Ben Collins <bcollins@ubuntu.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/usb/input/hiddev.c b/drivers/usb/input/hiddev.c
index 4dff847..3f72749 100644
--- a/drivers/usb/input/hiddev.c
+++ b/drivers/usb/input/hiddev.c
@@ -632,7 +632,7 @@
else if ((cmd == HIDIOCGUSAGES || cmd == HIDIOCSUSAGES) &&
(uref_multi->num_values > HID_MAX_MULTI_USAGES ||
- uref->usage_index + uref_multi->num_values >= field->report_count))
+ uref->usage_index + uref_multi->num_values > field->report_count))
goto inval;
}