linux-kernel - [PATCH] tpm_tis: Fix an error handling path in 'tpm_tis_core

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Message-Id: <7391611c2f2c5ca9fcea5b960fe6f7cac12121f4.1636216848.git.christophe.jaillet@wanadoo.fr>
Date:   Sat,  6 Nov 2021 17:42:04 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     peterhuewe@....de, jarkko@...nel.org, jgg@...pe.ca,
        hao.wu@...rik.com
Cc:     linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] tpm_tis: Fix an error handling path in 'tpm_tis_core_init()'

Commit 79ca6f74dae0 ("tpm: fix Atmel TPM crash caused by too frequent
queries") has moved some code around without updating the error handling
path.

This is now pointless to 'goto out_err' when neither 'clk_enable()' nor
'ioremap()' have been called yet.

Make a direct return instead to avoid undoing things that have not been
done.

Fixes: 79ca6f74dae0 ("tpm: fix Atmel TPM crash caused by too frequent queries")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/char/tpm/tpm_tis_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index b2659a4c4016..e672d2dc8937 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -952,7 +952,7 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
 
 	rc = tpm_tis_read32(priv, TPM_DID_VID(0), &vendor);
 	if (rc < 0)
-		goto out_err;
+		return rc;
 
 	priv->manufacturer_id = vendor;
 
-- 
2.30.2