diff options
| author | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2015-02-04 14:21:09 (GMT) |
|---|---|---|
| committer | Peter Huewe <peterhuewe@gmx.de> | 2015-02-15 15:59:15 (GMT) |
| commit | 4d5f2051cd24adc19a645e920344e05afe8d69b9 (patch) | |
| tree | c6397680572adf9968f4839e290bf2e048596e01 /drivers/char/tpm/tpm_tis.c | |
| parent | 74d6b3ceaa17d111220c3f09f50f901bf955d7c8 (diff) | |
| download | linux-4d5f2051cd24adc19a645e920344e05afe8d69b9.tar.xz | |
tpm, tpm_tis: fix TPM 2.0 probing
If during transmission system error was returned, the logic was to
incorrectly deduce that chip is a TPM 1.x chip. This patch fixes this
issue. Also, this patch changes probing so that message tag is used as the
measure for TPM 2.x, which should be much more stable. A separate function
called tpm2_probe() is encapsulated because it can be used with any
chipset.
Fixes: aec04cbdf723 ("tpm: TPM 2.0 FIFO Interface")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Diffstat (limited to 'drivers/char/tpm/tpm_tis.c')
| -rw-r--r-- | drivers/char/tpm/tpm_tis.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c index e12b3ab..f2dffa7 100644 --- a/drivers/char/tpm/tpm_tis.c +++ b/drivers/char/tpm/tpm_tis.c @@ -642,12 +642,9 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle, goto out_err; } - /* Every TPM 2.x command has a higher ordinal than TPM 1.x commands. - * Therefore, we can use an idempotent TPM 2.x command to probe TPM 2.x. - */ - rc = tpm2_gen_interrupt(chip, true); - if (rc == 0 || rc == TPM2_RC_INITIALIZE) - chip->flags |= TPM_CHIP_FLAG_TPM2; + rc = tpm2_probe(chip); + if (rc) + goto out_err; vendor = ioread32(chip->vendor.iobase + TPM_DID_VID(0)); chip->vendor.manufacturer_id = vendor; @@ -750,7 +747,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle, /* Generate Interrupts */ if (chip->flags & TPM_CHIP_FLAG_TPM2) - tpm2_gen_interrupt(chip, false); + tpm2_gen_interrupt(chip); else tpm_gen_interrupt(chip); |