diff options
Diffstat (limited to 'drivers/char')
-rw-r--r-- | drivers/char/agp/parisc-agp.c | 2 | ||||
-rw-r--r-- | drivers/char/tpm/tpm-chip.c | 2 | ||||
-rw-r--r-- | drivers/char/tpm/tpm_crb.c | 38 |
3 files changed, 12 insertions, 30 deletions
diff --git a/drivers/char/agp/parisc-agp.c b/drivers/char/agp/parisc-agp.c index 514f9f287a78..c6f181702b9a 100644 --- a/drivers/char/agp/parisc-agp.c +++ b/drivers/char/agp/parisc-agp.c @@ -394,8 +394,6 @@ find_quicksilver(struct device *dev, void *data) static int __init parisc_agp_init(void) { - extern struct sba_device *sba_list; - int err = -1; struct parisc_device *sba = NULL, *lba = NULL; struct lba_device *lbadev = NULL; diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c index 23f6f2eda84c..42b1062e33cd 100644 --- a/drivers/char/tpm/tpm-chip.c +++ b/drivers/char/tpm/tpm-chip.c @@ -33,7 +33,7 @@ const struct class tpm_class = { .shutdown_pre = tpm_class_shutdown, }; const struct class tpmrm_class = { - .name = "tmprm", + .name = "tpmrm", }; dev_t tpm_devt; diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c index 9eb1a1859012..ea085b14ab7c 100644 --- a/drivers/char/tpm/tpm_crb.c +++ b/drivers/char/tpm/tpm_crb.c @@ -463,28 +463,6 @@ static bool crb_req_canceled(struct tpm_chip *chip, u8 status) return (cancel & CRB_CANCEL_INVOKE) == CRB_CANCEL_INVOKE; } -static int crb_check_flags(struct tpm_chip *chip) -{ - u32 val; - int ret; - - ret = crb_request_locality(chip, 0); - if (ret) - return ret; - - ret = tpm2_get_tpm_pt(chip, TPM2_PT_MANUFACTURER, &val, NULL); - if (ret) - goto release; - - if (val == 0x414D4400U /* AMD */) - chip->flags |= TPM_CHIP_FLAG_HWRNG_DISABLED; - -release: - crb_relinquish_locality(chip, 0); - - return ret; -} - static const struct tpm_class_ops tpm_crb = { .flags = TPM_OPS_AUTO_STARTUP, .status = crb_status, @@ -797,12 +775,13 @@ static int crb_acpi_add(struct acpi_device *device) FW_BUG "TPM2 ACPI table has wrong size %u for start method type %d\n", buf->header.length, ACPI_TPM2_COMMAND_BUFFER_WITH_PLUTON); - return -EINVAL; + rc = -EINVAL; + goto out; } crb_pluton = ACPI_ADD_PTR(struct tpm2_crb_pluton, buf, sizeof(*buf)); rc = crb_map_pluton(dev, priv, buf, crb_pluton); if (rc) - return rc; + goto out; } priv->sm = sm; @@ -826,9 +805,14 @@ static int crb_acpi_add(struct acpi_device *device) if (rc) goto out; - rc = crb_check_flags(chip); - if (rc) - goto out; +#ifdef CONFIG_X86 + /* A quirk for https://www.amd.com/en/support/kb/faq/pa-410 */ + if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD && + priv->sm != ACPI_TPM2_COMMAND_BUFFER_WITH_PLUTON) { + dev_info(dev, "Disabling hwrng\n"); + chip->flags |= TPM_CHIP_FLAG_HWRNG_DISABLED; + } +#endif /* CONFIG_X86 */ rc = tpm_chip_register(chip); |