linux-kernel - Re: [PATCH v2] tpm_tis: Disable interrupts if interrupt storm detected

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Message-ID: <8a7d2fda891e45b098b603064d45dd7d53898fd4.camel@HansenPartnership.com>
Date:   Thu, 03 Dec 2020 13:05:02 -0800
From:   James Bottomley <James.Bottomley@...senPartnership.com>
To:     Jerry Snitselaar <jsnitsel@...hat.com>,
        Jarkko Sakkinen <jarkko@...nel.org>
Cc:     Jani Nikula <jani.nikula@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-integrity@...r.kernel.org,
        Jason Gunthorpe <jgg@...pe.ca>,
        Peter Huewe <peterhuewe@....de>,
        Matthew Garrett <mjg59@...gle.com>,
        Hans de Goede <hdegoede@...hat.com>
Subject: Re: [PATCH v2] tpm_tis: Disable interrupts if interrupt storm
 detected

On Thu, 2020-12-03 at 13:14 -0700, Jerry Snitselaar wrote:
> Jerry Snitselaar @ 2020-12-02 23:11 MST:
[...]
> > The interrupt storm detection code works on the T490s. I'm not sure
> > what is going on with the L490. I will see if I can get access to
> > one.
> > 
> > Jerry
> 
> Lenovo verified that the L490 hangs.

Just to confirm, that's this system:

https://www.lenovo.com/us/en/laptops/thinkpad/thinkpad-l/ThinkPad-L490/p/22TP2TBL490

We could ask if lenovo will give us one, but if not we could pull a
Jens.  [the backstory is that when Jens was doing queueing in the block
layer, there were lots of SATA devices that didn't work quite right but
you couldn't tell unless you actually tried them out.  Getting
manufacturers to send samples is rather arduous, so he took to ordering
them online, testing them out, and then returning them for a full
refund within the allowed window]

It looks like Lenovo has a nice christmas returns policy:

https://www.lenovo.com/us/en/shopping-faq/#returns

James