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tpm: Convert warn to dbg in tpm2_start_auth_session()

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TPM2 sessions have been flushed lazily since commit df745e2509 ("tpm:
Lazily flush the auth session").  If /dev/tpm{rm}0 is not accessed
in-between two in-kernel calls, it is possible that a TPM2 session is
re-started before the previous one has been completed.

This causes a spurios warning in a legit run-time condition, which is also
correctly addressed with a fast return path:

[    2.944047] tpm tpm0: auth session is active

Address the issue by changing dev_warn_once() call to a dev_dbg_once()
call.

[jarkko: Rewrote the commit message, and instead of dropping converted
 to a debug message.]
Signed-off-by: Jonathan McDowell <noodles@meta.com>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
This commit is contained in:
Jonathan McDowell 2025-03-07 10:56:44 +00:00 committed by Jarkko Sakkinen
parent 668f953bb4
commit 6359691b4f
1 changed files with 1 additions and 1 deletions
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2
drivers/char/tpm/tpm2-sessions.c
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@ -982,7 +982,7 @@ int tpm2_start_auth_session(struct tpm_chip *chip)
int rc;
if (chip->auth) {
dev_warn_once(&chip->dev, "auth session is active\n");
dev_dbg_once(&chip->dev, "auth session is active\n");
return 0;
}