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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Xiu Jianfeng <xiujianfeng@huawei.com>,
        Stefan Berger <stefanb@linux.ibm.com>,
        Jarkko Sakkinen <jarkko@kernel.org>
Subject: [PATCH 4.19 27/30] tpm: ibmvtpm: Correct the return value in tpm_ibmvtpm_probe()
Date:   Fri,  3 Jun 2022 19:39:55 +0200
Message-Id: <20220603173815.889423770@linuxfoundation.org>
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From: Xiu Jianfeng <xiujianfeng@huawei.com>

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 |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/char/tpm/tpm_ibmvtpm.c
+++ b/drivers/char/tpm/tpm_ibmvtpm.c
@@ -692,6 +692,7 @@ static int tpm_ibmvtpm_probe(struct vio_
 	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;
 	}