1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 1e1a7770a6b9..38db8321b211 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -880,6 +880,10 @@ static void hid_output_field(struct hid_field *field, __u8 *data)
         unsigned size = field->report_size;
         unsigned n;
 
+        /* make sure the unused bits in the last byte are zeros */
+        if (count > 0 && size > 0)
+                data[(count*size-1)/8] = 0;
+
         for (n = 0; n < count; n++) {
                 if (field->logical_minimum < 0) /* signed values */
                         implement(data, offset + n * size, size, s32ton(field->value[n], size));