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authorStefan Berger <stefanb@linux.ibm.com>2021-03-11 01:19:16 +0300
committerJarkko Sakkinen <jarkko@kernel.org>2021-04-14 16:30:30 +0300
commit9716ac65efc8f780549b03bddf41e60c445d4709 (patch)
tree4ec00dce1ae6d2e4eaa229f6b81393c870c33c8a /drivers/char
parent3dcd15665aca80197333500a4be3900948afccc1 (diff)
downloadlinux-9716ac65efc8f780549b03bddf41e60c445d4709.tar.xz
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 <stefanb@linux.ibm.com> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/tpm/eventlog/common.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/char/tpm/eventlog/common.c b/drivers/char/tpm/eventlog/common.c
index 7460f230bae4..8512ec76d526 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;