tpm: ibmvtpm: Correct the return value in tpm_ibmvtpm_probe()

commit d0dc1a7100f19121f6e7450f9cdda11926aa3838 upstream.

Currently it returns zero when CRQ response timed out, it should return
an error code instead.

Fixes: d8d74ea3c002 ("tpm: ibmvtpm: Wait for buffer to be set before proceeding")
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/char/tpm/tpm_ibmvtpm.c

@@ -692,6 +692,7 @@ static int tpm_ibmvtpm_probe(struct vio_dev *vio_dev,
 	if (!wait_event_timeout(ibmvtpm->crq_queue.wq,
 				ibmvtpm->rtce_buf != NULL,
 				HZ)) {
+		rc = -ENODEV;
 		dev_err(dev, "CRQ response timed out\n");
 		goto init_irq_cleanup;
 	}