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[v2] tpm: WARN_ONCE() -> dev_warn_once() in tpm_tis_status()

Message ID 20210202222150.120664-1-jarkko@kernel.org
State Superseded
Headers show
Series [v2] tpm: WARN_ONCE() -> dev_warn_once() in tpm_tis_status() | expand

Commit Message

Jarkko Sakkinen Feb. 2, 2021, 10:21 p.m. UTC 
An unexpected status from TPM chip is not irrecovable failure of the
kernel. It's only undesirable situation. Thus, change the WARN_ONCE()
instance inside tpm_tis_status() to dev_warn_once().

In addition: print the status in the log message because it is actually
useful information lacking from the existing log message.

Suggested-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Cc: stable@vger.kernel.org
Fixes: 6f4f57f0b909 ("tpm: ibmvtpm: fix error return code in tpm_ibmvtpm_probe()")
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
---
v2:
- Use dev_warn_once() instead of pr_warn_once(), as suggested by Jason.
 drivers/char/tpm/tpm_tis_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index 431919d5f48a..22b6c751c33a 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -202,7 +202,7 @@  static u8 tpm_tis_status(struct tpm_chip *chip)
 		 * acquired.  Usually because tpm_try_get_ops() hasn't
 		 * been called before doing a TPM operation.
 		 */
-		WARN_ONCE(1, "TPM returned invalid status\n");
+		dev_warn_once(&chip->dev, "TPM returned invalid status: 0x%x\n", status);
 		return 0;
 	}