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tpm: use tpm_pcr_read_dev() in tpm_do_selftest()

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Instead of a ad-hoc protocol message construction it is better to
call tpm_pcr_read_dev().

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
This commit is contained in:
Jarkko Sakkinen 2016-06-17 13:12:20 +02:00
parent ae7e190a3e
commit 0c54133223
1 changed files with 3 additions and 5 deletions
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8
drivers/char/tpm/tpm-interface.c
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@ -782,7 +782,7 @@ int tpm_do_selftest(struct tpm_chip *chip)
unsigned int loops;
unsigned int delay_msec = 100;
unsigned long duration;
struct tpm_cmd_t cmd;
u8 dummy[TPM_DIGEST_SIZE];
duration = tpm_calc_ordinal_duration(chip, TPM_ORD_CONTINUE_SELFTEST);
@ -797,9 +797,8 @@ int tpm_do_selftest(struct tpm_chip *chip)
do {
/* Attempt to read a PCR value */
cmd.header.in = pcrread_header;
cmd.params.pcrread_in.pcr_idx = cpu_to_be32(0);
rc = tpm_transmit(chip, (u8 *) &cmd, READ_PCR_RESULT_SIZE, 0);
rc = tpm_pcr_read_dev(chip, 0, dummy);
/* Some buggy TPMs will not respond to tpm_tis_ready() for
* around 300ms while the self test is ongoing, keep trying
* until the self test duration expires. */
@ -814,7 +813,6 @@ int tpm_do_selftest(struct tpm_chip *chip)
if (rc < TPM_HEADER_SIZE)
return -EFAULT;
rc = be32_to_cpu(cmd.header.out.return_code);
if (rc == TPM_ERR_DISABLED || rc == TPM_ERR_DEACTIVATED) {
dev_info(&chip->dev,
"TPM is disabled/deactivated (0x%X)\n", rc);