linux-kernel - Re: [PATCH] tpm/tpm_tis: Disable interrupts for Lenovo Thinkpad E14 Gen 2 and 13s-IML

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Message-Id: <CUOYJI68K3KG.39YM92JXBEIQ9@wks-101042-mac.ad.tuni.fi>
Date:   Thu, 10 Aug 2023 18:08:04 +0300
From:   "Jarkko Sakkinen" <jarkko@...nel.org>
To:     "Takashi Iwai" <tiwai@...e.de>
Cc:     "Peter Huewe" <peterhuewe@....de>,
        "Jason Gunthorpe" <jgg@...pe.ca>,
        <linux-integrity@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tpm/tpm_tis: Disable interrupts for Lenovo Thinkpad E14
 Gen 2 and 13s-IML

On Tue Aug 8, 2023 at 9:12 AM EEST, Takashi Iwai wrote:
> On Mon, 07 Aug 2023 21:14:20 +0200,
> Jarkko Sakkinen wrote:
> > 
> > On Mon Aug 7, 2023 at 2:01 PM UTC, Takashi Iwai wrote:
> > > Like other Lenovo laptops, Thinkpad E14 Gen 2 and Thinkpad 13s-IML
> > > also require to disable the tpm_tis interrupts for avoiding a boot
> > > hang.
> > >
> > > Fixes: e644b2f498d2 ("tpm, tpm_tis: Enable interrupt test")
> > > Cc: <stable@...r.kernel.org> # v6.4+
> > > Link: https://bugzilla.suse.com/show_bug.cgi?id=1213779
> > > Signed-off-by: Takashi Iwai <tiwai@...e.de>
> > >
> > > ---
> > >  drivers/char/tpm/tpm_tis.c | 16 ++++++++++++++++
> > >  1 file changed, 16 insertions(+)
> > >
> > > diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
> > > index a98773ac2e55..0633823dc515 100644
> > > --- a/drivers/char/tpm/tpm_tis.c
> > > +++ b/drivers/char/tpm/tpm_tis.c
> > > @@ -130,6 +130,22 @@ static const struct dmi_system_id tpm_tis_dmi_table[] = {
> > >  			DMI_MATCH(DMI_PRODUCT_NAME, "Laptop (13th Gen Intel Core)"),
> > >  		},
> > >  	},
> > > +	{
> > > +		.callback = tpm_tis_disable_irq,
> > > +		.ident = "ThinkPad E14 Gen 2",
> > > +		.matches = {
> > > +			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
> > > +			DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad E14 Gen 2"),
> > > +		},
> > > +	},
> > > +	{
> > > +		.callback = tpm_tis_disable_irq,
> > > +		.ident = "ThinkBook 13s-IML",
> > > +		.matches = {
> > > +			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
> > > +			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ThinkBook 13s-IML"),
> > > +		},
> > > +	},
> > >  	{
> > >  		.callback = tpm_tis_disable_irq,
> > >  		.ident = "ThinkPad T490s",
> > > -- 
> > > 2.35.3
> > 
> > As almost all issues are with Lenovo, I would instead just put:
> > 
> > 	{
> > 		.callback = tpm_tis_disable_irq,
> > 		.matches = {
> > 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
> > 		},
> > 	},
> > 
> > And delete the existing entries with vendor as "LENOVO".
>
> Yeah, that will relieve pains better, too.

Please do it if possible then :-)

BR, Jarkko