From e3e1a1e169d4e7f73c60ded937ebe24526bc6427 Mon Sep 17 00:00:00 2001 From: Stefan Berger Date: Wed, 30 Mar 2011 12:13:27 -0400 Subject: [PATCH] tpm: Adjust interface timeouts if they are too small Adjust the interface timeouts if they are found to be too small, i.e., if they are returned in milliseconds rather than microseconds as we heared from Infineon that some (old) Infineon TPMs do. Signed-off-by: Stefan Berger Signed-off-by: Rajiv Andrade --- drivers/char/tpm/tpm.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index 0a475c7fe5ce..533ae359cb28 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -534,6 +534,7 @@ void tpm_get_timeouts(struct tpm_chip *chip) struct duration_t *duration_cap; ssize_t rc; u32 timeout; + unsigned int scale = 1; tpm_cmd.header.in = tpm_getcap_header; tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP; @@ -553,17 +554,21 @@ void tpm_get_timeouts(struct tpm_chip *chip) timeout_cap = &tpm_cmd.params.getcap_out.cap.timeout; /* Don't overwrite default if value is 0 */ timeout = be32_to_cpu(timeout_cap->a); + if (timeout && timeout < 1000) { + /* timeouts in msec rather usec */ + scale = 1000; + } if (timeout) - chip->vendor.timeout_a = usecs_to_jiffies(timeout); + chip->vendor.timeout_a = usecs_to_jiffies(timeout * scale); timeout = be32_to_cpu(timeout_cap->b); if (timeout) - chip->vendor.timeout_b = usecs_to_jiffies(timeout); + chip->vendor.timeout_b = usecs_to_jiffies(timeout * scale); timeout = be32_to_cpu(timeout_cap->c); if (timeout) - chip->vendor.timeout_c = usecs_to_jiffies(timeout); + chip->vendor.timeout_c = usecs_to_jiffies(timeout * scale); timeout = be32_to_cpu(timeout_cap->d); if (timeout) - chip->vendor.timeout_d = usecs_to_jiffies(timeout); + chip->vendor.timeout_d = usecs_to_jiffies(timeout * scale); duration: tpm_cmd.header.in = tpm_getcap_header; -- 2.39.5