From: Jonathan McDowell <[email protected]>
[ 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 <[email protected]>
Signed-off-by: Jarkko Sakkinen <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
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 b0f13c8ea79c7..7c829de09afb0 100644
--- a/drivers/char/tpm/tpm2-sessions.c
+++ b/drivers/char/tpm/tpm2-sessions.c
@@ -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;
}
--
2.39.5
