6.12-stable review patch. If anyone has any objections, please let me know.
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From: Jonathan McDowell noodles@meta.com
[ Upstream commit 6359691b4fbcaf3ed86f53043a1f7c6cc54c09be ]
TPM2 sessions have been flushed lazily since commit df745e25098dc ("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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/char/tpm/tpm2-sessions.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/tpm/tpm2-sessions.c b/drivers/char/tpm/tpm2-sessions.c index ecea089157301..cf0b831540447 100644 --- a/drivers/char/tpm/tpm2-sessions.c +++ b/drivers/char/tpm/tpm2-sessions.c @@ -974,7 +974,7 @@ 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; }