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

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Message-Id: <20230511005403.24689-1-jsnitsel@redhat.com>
Date:   Wed, 10 May 2023 17:54:03 -0700
From:   Jerry Snitselaar <jsnitsel@...hat.com>
To:     linux-kernel@...r.kernel.org, linux-integrity@...r.kernel.org
Cc:     Peter Zijlstra <peterz@...radead.org>, stable@...r.kernel.org,
        Peter Huewe <peterhuewe@....de>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Jason Gunthorpe <jgg@...pe.ca>
Subject: [PATCH] tpm/tpm_tis: Disable interrupts for more Lenovo devices

The P360 Tiny suffers from an irq storm issue like the T490s, so add
an entry for it to tpm_tis_dmi_table, and force polling. There also
previously was a report from the previous attempt to enable interrupts
that involved a ThinkPad L490. So an entry is added for it as well.

Reported-by: Peter Zijlstra <peterz@...radead.org> # P360 Tiny
Closes: https://lore.kernel.org/linux-integrity/20230505130731.GO83892@hirez.programming.kicks-ass.net/
Cc: stable@...r.kernel.org # 6.2
Cc: Peter Huewe <peterhuewe@....de>
Cc: Jarkko Sakkinen <jarkko@...nel.org>
Cc: Jason Gunthorpe <jgg@...pe.ca>
Signed-off-by: Jerry Snitselaar <jsnitsel@...hat.com>
---
 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 7af389806643..709b4e13bd6e 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -122,6 +122,22 @@ static const struct dmi_system_id tpm_tis_dmi_table[] = {
 			DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T490s"),
 		},
 	},
+	{
+		.callback = tpm_tis_disable_irq,
+		.ident = "ThinkStation P360 Tiny",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkStation P360 Tiny"),
+		},
+	},
+	{
+		.callback = tpm_tis_disable_irq,
+		.ident = "ThinkPad L490",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L490"),
+		},
+	},
 	{}
 };
 
-- 
2.38.1