linux-kernel - Re: [PATCH 03/13] tpm: xen-tpmfront: Fix default durations

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Message-ID: <20130923185158.GA2507@phenom.dumpdata.com>
Date:	Mon, 23 Sep 2013 14:51:58 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	david.vrabel@...rix.com, boris.ostrovsky@...cle.com
Cc:	tpmdd-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	Ashley Lai <ashley@...leylai.com>,
	Rajiv Andrade <mail@...jiv.net>,
	Leonidas Da Silva Barbosa <leosilva@...ux.vnet.ibm.com>,
	Marcel Selhorst <tpmdd@...horst.net>,
	Sirrix AG <tpmdd@...rix.com>, Peter Huewe <peterhuewe@....de>,
	Daniel De Graaf <dgdegra@...ho.nsa.gov>
Subject: Re: [PATCH 03/13] tpm: xen-tpmfront: Fix default durations

On Mon, Sep 23, 2013 at 12:14:33PM -0600, Jason Gunthorpe wrote:
> All the default durations were being set to 10 minutes which is
> way too long for the timeouts. Normal values for the longest
> duration are around 5 mins, and short duration ar around .5s.
> 
> Further, these are just the default, tpm_get_timeouts will set
> them to values from the TPM (or throw an error).
> 
> Just remove them.

Sounds sensible.

Daniel?

> 
> Cc: Daniel De Graaf <dgdegra@...ho.nsa.gov>
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> Signed-off-by: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
> ---
>  drivers/char/tpm/xen-tpmfront.c | 7 -------
>  1 file changed, 7 deletions(-)
> 
> diff --git a/drivers/char/tpm/xen-tpmfront.c b/drivers/char/tpm/xen-tpmfront.c
> index 7a7929b..6f2fe2b 100644
> --- a/drivers/char/tpm/xen-tpmfront.c
> +++ b/drivers/char/tpm/xen-tpmfront.c
> @@ -210,8 +210,6 @@ static struct attribute_group vtpm_attr_grp = {
>  	.attrs = vtpm_attrs,
>  };
>  
> -#define TPM_LONG_TIMEOUT   (10 * 60 * HZ)
> -
>  static const struct tpm_vendor_specific tpm_vtpm = {
>  	.status = vtpm_status,
>  	.recv = vtpm_recv,
> @@ -224,11 +222,6 @@ static const struct tpm_vendor_specific tpm_vtpm = {
>  	.miscdev = {
>  		.fops = &vtpm_ops,
>  	},
> -	.duration = {
> -		TPM_LONG_TIMEOUT,
> -		TPM_LONG_TIMEOUT,
> -		TPM_LONG_TIMEOUT,
> -	},
>  };
>  
>  static irqreturn_t tpmif_interrupt(int dummy, void *dev_id)
> -- 
> 1.8.1.2
> 
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