From: Stefan Berger Date: Wed, 10 Mar 2021 22:19:16 +0000 (-0500) Subject: tpm: vtpm_proxy: Avoid reading host log when using a virtual device X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9716ac65efc8f780549b03bddf41e60c445d4709;p=linux.git tpm: vtpm_proxy: Avoid reading host log when using a virtual device Avoid allocating memory and reading the host log when a virtual device is used since this log is of no use to that driver. A virtual device can be identified through the flag TPM_CHIP_FLAG_VIRTUAL, which is only set for the tpm_vtpm_proxy driver. Cc: stable@vger.kernel.org Fixes: 6f99612e2500 ("tpm: Proxy driver for supporting multiple emulated TPMs") Signed-off-by: Stefan Berger Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen --- diff --git a/drivers/char/tpm/eventlog/common.c b/drivers/char/tpm/eventlog/common.c index 7460f230bae4c..8512ec76d5260 100644 --- a/drivers/char/tpm/eventlog/common.c +++ b/drivers/char/tpm/eventlog/common.c @@ -107,6 +107,9 @@ void tpm_bios_log_setup(struct tpm_chip *chip) int log_version; int rc = 0; + if (chip->flags & TPM_CHIP_FLAG_VIRTUAL) + return; + rc = tpm_read_log(chip); if (rc < 0) return;