Jason Gunthorpe <[email protected]> wrote on 02/09/2016
12:29:57 AM:
>
> On Mon, Feb 08, 2016 at 02:27:06PM -0500, Stefan Berger wrote:
> > Make tpm_startup() available for others to call.
>
> Why? Just call tpm_get_timeouts.
See the subsequent patch.
tpm_get_timeouts will first try to get the timeouts and will fail since
the TPM hasn't been initialized
and only then it will try a tpm_startup.
http://lxr.free-electrons.com/source/drivers/char/tpm/tpm-interface.c#L508
We want to prevent that user space is already waiting in the transmission
lock waiting to send its first
command and ends up sending a command before the tpm_startup.
http://lxr.free-electrons.com/ident?i=mutex_lock
Stefan
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