1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 1cca32f46947..62e21cc73938 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -4,7 +4,7 @@
  *  Copyright (c) 1999 Andreas Gal
  *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
  *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
- *  Copyright (c) 2006 Jiri Kosina
+ *  Copyright (c) 2006-2007 Jiri Kosina
  */
 
 /*
@@ -37,7 +37,7 @@
  */
 
 #define DRIVER_VERSION "v2.6"
-#define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik"
+#define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik, Jiri Kosina"
 #define DRIVER_DESC "HID core driver"
 #define DRIVER_LICENSE "GPL"
 
@@ -872,8 +872,13 @@ static void hid_output_field(struct hid_field *field, __u8 *data)
         unsigned count = field->report_count;
         unsigned offset = field->report_offset;
         unsigned size = field->report_size;
+        unsigned bitsused = offset + count * size;
         unsigned n;
 
+        /* make sure the unused bits in the last byte are zeros */
+        if (count > 0 && size > 0 && (bitsused % 8) != 0)
+                data[(bitsused-1)/8] &= (1 << (bitsused % 8)) - 1;
+
         for (n = 0; n < count; n++) {
                 if (field->logical_minimum < 0) /* signed values */
                         implement(data, offset + n * size, size, s32ton(field->value[n], size));