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

From: Jerry Snitselaar
Date: Wed May 10 2023 - 20:55:05 EST


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@xxxxxxxxxxxxx> # P360 Tiny
Closes: https://lore.kernel.org/linux-integrity/20230505130731.GO83892@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/
Cc: stable@xxxxxxxxxxxxxxx # 6.2
Cc: Peter Huewe <peterhuewe@xxxxxx>
Cc: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxx>
Signed-off-by: Jerry Snitselaar <jsnitsel@xxxxxxxxxx>
---
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