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tpmdd updates for Linux v5.10-rc4

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Merge tag 'tpmdd-next-v5.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd

Pull tpm fixes from Jarkko Sakkinen:
 "Two critical tpm driver bug fixes"

* tag 'tpmdd-next-v5.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd:
  tpm: efi: Don't create binary_bios_measurements file for an empty log
  tpm_tis: Disable interrupts on ThinkPad T490s
This commit is contained in:
Linus Torvalds 2020-11-06 12:51:29 -08:00
commit 28ced768a4
2 changed files with 32 additions and 2 deletions
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5
drivers/char/tpm/eventlog/efi.c
View File

@ -41,6 +41,11 @@ int tpm_read_log_efi(struct tpm_chip *chip)
log_size = log_tbl->size;
memunmap(log_tbl);
if (!log_size) {
pr_warn("UEFI TPM log area empty\n");
return -EIO;
}
log_tbl = memremap(efi.tpm_log, sizeof(*log_tbl) + log_size,
MEMREMAP_WB);
if (!log_tbl) {

29
drivers/char/tpm/tpm_tis.c
View File

@ -27,6 +27,7 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/kernel.h>
#include <linux/dmi.h>
#include "tpm.h"
#include "tpm_tis_core.h"
@ -49,8 +50,8 @@ static inline struct tpm_tis_tcg_phy *to_tpm_tis_tcg_phy(struct tpm_tis_data *da
return container_of(data, struct tpm_tis_tcg_phy, priv);
}
static bool interrupts = true;
module_param(interrupts, bool, 0444);
static int interrupts = -1;
module_param(interrupts, int, 0444);
MODULE_PARM_DESC(interrupts, "Enable interrupts");
static bool itpm;
@ -63,6 +64,28 @@ module_param(force, bool, 0444);
MODULE_PARM_DESC(force, "Force device probe rather than using ACPI entry");
#endif
static int tpm_tis_disable_irq(const struct dmi_system_id *d)
{
if (interrupts == -1) {
pr_notice("tpm_tis: %s detected: disabling interrupts.\n", d->ident);
interrupts = 0;
}
return 0;
}
static const struct dmi_system_id tpm_tis_dmi_table[] = {
{
.callback = tpm_tis_disable_irq,
.ident = "ThinkPad T490s",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T490s"),
},
},
{}
};
#if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
static int has_hid(struct acpi_device *dev, const char *hid)
{
@ -192,6 +215,8 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info)
int irq = -1;
int rc;
dmi_check_system(tpm_tis_dmi_table);
rc = check_acpi_tpm2(dev);
if (rc)
return rc;