mutex_lock(&spidev->buf_lock);
status = spidev_sync_read(spidev, count);
mutex_lock(&spidev->buf_lock);
status = spidev_sync_read(spidev, count);
- missing = copy_to_user(buf, spidev->buffer, count);
- if (count && missing == count)
+ missing = copy_to_user(buf, spidev->buffer, status);
+ if (missing == status)
missing = copy_from_user(spidev->buffer, buf, count);
if (missing == 0) {
status = spidev_sync_write(spidev, count);
missing = copy_from_user(spidev->buffer, buf, count);
if (missing == 0) {
status = spidev_sync_write(spidev, count);