Commit e117e7ad authored by Jonathan McDowell's avatar Jonathan McDowell Committed by Jarkko Sakkinen
Browse files

tpm/tpm_tis: Disable interrupts for Lenovo P620 devices 



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 481c2d14 (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: e644b2f4 ("tpm, tpm_tis: Enable interrupt test")
Signed-off-by: default avatarJonathan McDowell <noodles@meta.com>
Reviewed-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
parent 554b841d

drivers/char/tpm/tpm_tis.c

+8 −0
Original line number Diff line number Diff line
@@ -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",