Re: [PATCH v2] tpm_tis: Use timeouts returned from TPM

From: Jiri Slaby
Date: Sat Feb 26 2011 - 06:45:28 EST

On 02/22/2011 08:41 PM, Stefan Berger wrote:
> Below patch applies to the tip of the git tree.
> v2:
> - adjusting all timeouts for TPM devices reporting too low timeout
> numbers
> - also displaying in sysfs whether the timeouts are 'original' or
> 'adjusted'
> The current TPM TIS driver in git discards the 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 + 3 timeout indicators of type u32.
> Since some TPMs seem to return timeouts in msec rather than usec,
> I am now adjusting all the timeouts rather than just the one for short
> durations.
> I am also adding a sysfs entry 'timeouts' showing the timeouts that are
> being used.

It works:
# dmesg
[15318.813905] tpm_tis 00:0c: 1.2 TPM (device-id 0xB, rev-id 16)
[15318.879154] tpm_tis 00:0c: Adjusting TPM timeout parameters.
# cat /sys/devices/pnp0/00\:0*/timeouts
1000000 2000000 150000000 [adjusted]

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