Re: [PATCH] tpm_tis: turn on TPM before calling tpm_get_timeouts

[Jason Gunthorpe <jgg@ziepe.ca>]

On Thu, Nov 14, 2019 at 06:55:06PM +0200, Jarkko Sakkinen wrote:
> > Would it function with the timeout values set at the beginning of
> > tpm_tis_core_init (max values)?
> 
> tpm_get_timeouts() should be replaced with:
> 
> if (tpm_chip_start()) {
> 	dev_err(dev, "Could not get TPM timeouts and durations\n");
> 	rc = -ENODEV;
> 	goto out_err;
> }
> 
> tpm_stop_chip(chip);
> 
> tpm_get_timeouts() is called by tpm_auto_startup(). Also the function
> should be moved to tpm_chip.c and converted to a static function so
> that it won't be called from random cal sites like above.

Careful, the design here was to allow a driver to do only
get_timeouts, then additional setup work, then do auto_startup()

Forcing a driver to do auto_startup too early may not be good.

Jason