tpm: Use durations returned from TPM
The TPM driver currently discards the durations 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 + 3 timeout indicators of type u32. v4: - sysfs entry 'durations' is now a patch of its own - the work-around for TPMs reporting durations in milliseconds is now in a patch of its own v3: - sysfs entry now called 'durations' to resemble TPM-speak (previously was called 'timeouts') v2: - adjusting all timeouts for TPM devices reporting timeouts in msec rather than usec - also displaying in sysfs whether the timeouts are 'original' or 'adjusted' Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Tested-by: Guillaume Chazarain <guichaz@gmail.com> Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
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@ -575,9 +575,11 @@ duration:
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if (rc)
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return;
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if (be32_to_cpu(tpm_cmd.header.out.return_code)
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!= 3 * sizeof(u32))
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if (be32_to_cpu(tpm_cmd.header.out.return_code) != 0 ||
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be32_to_cpu(tpm_cmd.header.out.length)
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!= sizeof(tpm_cmd.header.out) + sizeof(u32) + 3 * sizeof(u32))
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return;
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duration_cap = &tpm_cmd.params.getcap_out.cap.duration;
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chip->vendor.duration[TPM_SHORT] =
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usecs_to_jiffies(be32_to_cpu(duration_cap->tpm_short));
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