linux-kernel - [PATCH v2] tpm: ibmvtpm: fix error return code in tpm_ibmvtpm

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Message-Id: <20210126014753.340299-1-stefanb@linux.vnet.ibm.com>
Date:   Mon, 25 Jan 2021 20:47:53 -0500
From:   Stefan Berger <stefanb@...ux.vnet.ibm.com>
To:     jarkko@...nel.org, linux-integrity@...r.kernel.org
Cc:     linuxppc-dev@...ts.ozlabs.org, mpe@...erman.id.au,
        benh@...nel.crashing.org, paulus@...ba.org,
        linux-kernel@...r.kernel.org,
        Stefan Berger <stefanb@...ux.ibm.com>,
        Hulk Robot <hulkci@...wei.com>, Wang Hai <wanghai38@...wei.com>
Subject: [PATCH v2] tpm: ibmvtpm: fix error return code in tpm_ibmvtpm_probe()

From: Stefan Berger <stefanb@...ux.ibm.com>

Return error code -ETIMEDOUT rather than '0' when waiting for the
rtce_buf to be set has timed out.

Fixes: d8d74ea3c002 ("tpm: ibmvtpm: Wait for buffer to be set before proceeding")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Wang Hai <wanghai38@...wei.com>
Signed-off-by: Stefan Berger <stefanb@...ux.ibm.com>
---
 drivers/char/tpm/tpm_ibmvtpm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/char/tpm/tpm_ibmvtpm.c b/drivers/char/tpm/tpm_ibmvtpm.c
index 994385bf37c0..813eb2cac0ce 100644
--- a/drivers/char/tpm/tpm_ibmvtpm.c
+++ b/drivers/char/tpm/tpm_ibmvtpm.c
@@ -687,6 +687,7 @@ static int tpm_ibmvtpm_probe(struct vio_dev *vio_dev,
 				ibmvtpm->rtce_buf != NULL,
 				HZ)) {
 		dev_err(dev, "CRQ response timed out\n");
+		rc = -ETIMEDOUT;
 		goto init_irq_cleanup;
 	}
 
-- 
2.25.4