From 6b718101cd99de9d9357faeccac1f40ab6db6e0b Mon Sep 17 00:00:00 2001 From: Jonathan McDowell Date: Fri, 4 Aug 2023 17:08:40 +0000 Subject: [PATCH] tpm/tpm_tis: Disable interrupts for Lenovo P620 devices commit e117e7adc637e364b599dc766f1d740698e7e027 upstream. The Lenovo ThinkStation P620 suffers from an irq storm issue like various other Lenovo machines, so add an entry for it to tpm_tis_dmi_table and force polling. It is worth noting that 481c2d14627d (tpm,tpm_tis: Disable interrupts after 1000 unhandled IRQs) does not seem to fix the problem on this machine, but setting 'tpm_tis.interrupts=0' on the kernel command line does. [jarkko@kernel.org: truncated the commit ID in the description to 12 characters] Cc: stable@vger.kernel.org # v6.4+ Fixes: e644b2f498d2 ("tpm, tpm_tis: Enable interrupt test") Signed-off-by: Jonathan McDowell Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen Signed-off-by: Greg Kroah-Hartman --- 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 a98773ac2e55..ac4daaf294a3 100644 --- a/drivers/char/tpm/tpm_tis.c +++ b/drivers/char/tpm/tpm_tis.c @@ -162,6 +162,14 @@ static const struct dmi_system_id tpm_tis_dmi_table[] = { DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L590"), }, }, + { + .callback = tpm_tis_disable_irq, + .ident = "ThinkStation P620", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkStation P620"), + }, + }, { .callback = tpm_tis_disable_irq, .ident = "TUXEDO InfinityBook S 15/17 Gen7",