linux-kernel - [PATCH] tpm: tpm_tis: Narrow the AAEON DMI quirk to UPX-i11 only

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Date:   Wed, 24 May 2023 08:58:15 +0300
From:   Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>
To:     peterhuewe@....de, jarkko@...nel.org
Cc:     jgg@...pe.ca, linux-integrity@...r.kernel.org,
        linux-kernel@...r.kernel.org, l.sanfilippo@...bus.com,
        peter.ujfalusi@...ux.intel.com, jsnitsel@...hat.com
Subject: [PATCH] tpm: tpm_tis: Narrow the AAEON DMI quirk to UPX-i11 only

The original patch which added the quirk would apply to all AAEON machines,
which might or might not be valid.

The issue was discovered on UPX-i11 (TigerLake), it is not known if the
i12 (AlderLake) version is affected.
UP2 (ApolloLake) does not even have TMP module (no TPM drivers probing
and confirmed by dmidecode).

Let's make the quirk to be applicable for UPX-i11 (UPX-TGL01) only.

Fixes: 95a9359ee22f ("tpm: tpm_tis: Disable interrupts for AEON UPX-i11")
Suggested-by: Jerry Snitselaar <jsnitsel@...hat.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>
---
Hi Jarkko,

the patch is generated on top of your
git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git : irq-storm

Regards,
Peter

 drivers/char/tpm/tpm_tis.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 7db3593941ea..4357d4ba8f9e 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -143,6 +143,7 @@ static const struct dmi_system_id tpm_tis_dmi_table[] = {
 		.ident = "UPX-TGL",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "AAEON"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "UPX-TGL01"),
 		},
 	},
 	{}
-- 
2.40.1