Fix to return a negative error code -EINVAL instead of 0.
Fixes: 0cec19c761e5 ("crypto: qat - add support for compression for 4xxx") Signed-off-by: Wang Yufen <wangyufen@huawei.com> Acked-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>