From: Stefan Berger Date: Wed, 30 Mar 2011 16:13:27 +0000 (-0400) Subject: tpm: Adjust interface timeouts if they are too small X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e3e1a1e169d4e7f73c60ded937ebe24526bc6427;p=mv-sheeva.git 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 --- diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index 0a475c7fe5c..533ae359cb2 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;