linux-kernel - Re: [PATCH] tpm/tpm_tis: Disable interrupts for Lenovo L590 devices

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Message-ID: <qaghyyi3wd6sfppfkbf2d6spsnfafalseeznyjf5bgdj5nikdy@mz4t52hjkuus>
Date:   Thu, 29 Jun 2023 09:58:51 -0700
From:   Jerry Snitselaar <jsnitsel@...hat.com>
To:     Florian Bezdeka <florian@...deka.de>
Cc:     Peter Huewe <peterhuewe@....de>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Lino Sanfilippo <l.sanfilippo@...bus.com>,
        Hans de Goede <hdegoede@...hat.com>,
        linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tpm/tpm_tis: Disable interrupts for Lenovo L590 devices

On Tue, Jun 20, 2023 at 01:11:01PM +0200, Florian Bezdeka wrote:
> The Lenovo L590 suffers from an irq storm issue like the T490, T490s
> and P360 Tiny, so add an entry for it to tpm_tis_dmi_table and force
> polling.
> 
> Link: https://bugzilla.redhat.com/show_bug.cgi?id=2214069#c0
> Fixes: e644b2f498d2 ("tpm, tpm_tis: Enable interrupt test")
> Signed-off-by: Florian Bezdeka <florian@...deka.de>

Reviewed-by: Jerry Snitselaar <jsnitsel@...hat.com>

> ---
>  drivers/char/tpm/tpm_tis.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
> index 7db3593941ea..2771abb5628f 100644
> --- a/drivers/char/tpm/tpm_tis.c
> +++ b/drivers/char/tpm/tpm_tis.c
> @@ -138,6 +138,14 @@ static const struct dmi_system_id tpm_tis_dmi_table[] = {
>  			DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L490"),
>  		},
>  	},
> +	{
> +		.callback = tpm_tis_disable_irq,
> +		.ident = "ThinkPad L590",
> +		.matches = {
> +			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
> +			DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L590"),
> +		},
> +	},
>  	{
>  		.callback = tpm_tis_disable_irq,
>  		.ident = "UPX-TGL",
> 
> ---
> base-commit: 9561de3a55bed6bdd44a12820ba81ec416e705a7
> change-id: 20230620-flo-lenovo-l590-tpm-fix-4aeb6aa25667
> 
> Best regards,
> -- 
> Florian Bezdeka <florian@...deka.de>
>