diff options
| -rw-r--r-- | drivers/hid/hid-core.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index 7c0fab1efb2e..e8387cb95d7f 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -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)); |