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

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Message-Id: <20230620-flo-lenovo-l590-tpm-fix-v1-1-16032a8b5a1d@bezdeka.de>
Date:   Tue, 20 Jun 2023 13:11:01 +0200
From:   Florian Bezdeka <florian@...deka.de>
To:     Peter Huewe <peterhuewe@....de>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Lino Sanfilippo <l.sanfilippo@...bus.com>
Cc:     Hans de Goede <hdegoede@...hat.com>,
        linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
        Florian Bezdeka <florian@...deka.de>
Subject: [PATCH] tpm/tpm_tis: Disable interrupts for Lenovo L590 devices

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>
---
 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>