From 829bf0675272d24ba0056f5f79e09544464f0c8d Mon Sep 17 00:00:00 2001 From: Stefan Berger Date: Wed, 30 Mar 2011 12:13:26 -0400 Subject: tpm: Use interface timeouts returned from the TPM The TPM driver currently discards the interface timeout values returned from the TPM. The check of the response packet needs to consider that the return_code field is 0 on success and the size of the expected packet is equivalent to the header size + u32 length indicator for the TPM_GetCapability() result + 4 interface timeout indicators of type u32. Signed-off-by: Stefan Berger Signed-off-by: Rajiv Andrade --- drivers/char/tpm/tpm.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index 27abfd93714d..0a475c7fe5ce 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -545,9 +545,10 @@ void tpm_get_timeouts(struct tpm_chip *chip) if (rc) goto duration; - if (be32_to_cpu(tpm_cmd.header.out.length) - != 4 * sizeof(u32)) - goto duration; + if (be32_to_cpu(tpm_cmd.header.out.return_code) != 0 || + be32_to_cpu(tpm_cmd.header.out.length) + != sizeof(tpm_cmd.header.out) + sizeof(u32) + 4 * sizeof(u32)) + return; timeout_cap = &tpm_cmd.params.getcap_out.cap.timeout; /* Don't overwrite default if value is 0 */ -- cgit v1.2.3