Commit a6831a89 authored by Linus Torvalds's avatar Linus Torvalds

Merge tag 'tpmdd-next-20190805' of git://git.infradead.org/users/jjs/linux-tpmdd

Pull tpm fixes from Jarkko Sakkinen:
 "Two bug fixes that did not make into my first pull request"

* tag 'tpmdd-next-20190805' of git://git.infradead.org/users/jjs/linux-tpmdd:
  tpm: tpm_ibm_vtpm: Fix unallocated banks
  tpm: Fix null pointer dereference on chip register error path
parents 62d17163 fa4f99c0
......@@ -77,6 +77,18 @@ static int tpm_go_idle(struct tpm_chip *chip)
return chip->ops->go_idle(chip);
}
static void tpm_clk_enable(struct tpm_chip *chip)
{
if (chip->ops->clk_enable)
chip->ops->clk_enable(chip, true);
}
static void tpm_clk_disable(struct tpm_chip *chip)
{
if (chip->ops->clk_enable)
chip->ops->clk_enable(chip, false);
}
/**
* tpm_chip_start() - power on the TPM
* @chip: a TPM chip to use
......@@ -89,13 +101,12 @@ int tpm_chip_start(struct tpm_chip *chip)
{
int ret;
if (chip->ops->clk_enable)
chip->ops->clk_enable(chip, true);
tpm_clk_enable(chip);
if (chip->locality == -1) {
ret = tpm_request_locality(chip);
if (ret) {
chip->ops->clk_enable(chip, false);
tpm_clk_disable(chip);
return ret;
}
}
......@@ -103,8 +114,7 @@ int tpm_chip_start(struct tpm_chip *chip)
ret = tpm_cmd_ready(chip);
if (ret) {
tpm_relinquish_locality(chip);
if (chip->ops->clk_enable)
chip->ops->clk_enable(chip, false);
tpm_clk_disable(chip);
return ret;
}
......@@ -124,8 +134,7 @@ void tpm_chip_stop(struct tpm_chip *chip)
{
tpm_go_idle(chip);
tpm_relinquish_locality(chip);
if (chip->ops->clk_enable)
chip->ops->clk_enable(chip, false);
tpm_clk_disable(chip);
}
EXPORT_SYMBOL_GPL(tpm_chip_stop);
......@@ -545,6 +554,20 @@ static int tpm_add_hwrng(struct tpm_chip *chip)
return hwrng_register(&chip->hwrng);
}
static int tpm_get_pcr_allocation(struct tpm_chip *chip)
{
int rc;
rc = (chip->flags & TPM_CHIP_FLAG_TPM2) ?
tpm2_get_pcr_allocation(chip) :
tpm1_get_pcr_allocation(chip);
if (rc > 0)
return -ENODEV;
return rc;
}
/*
* tpm_chip_register() - create a character device for the TPM chip
* @chip: TPM chip to use.
......@@ -564,6 +587,12 @@ int tpm_chip_register(struct tpm_chip *chip)
if (rc)
return rc;
rc = tpm_auto_startup(chip);
if (rc) {
tpm_chip_stop(chip);
return rc;
}
rc = tpm_get_pcr_allocation(chip);
tpm_chip_stop(chip);
if (rc)
return rc;
......
......@@ -394,6 +394,7 @@ int tpm1_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf);
ssize_t tpm1_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
const char *desc, size_t min_cap_length);
int tpm1_get_random(struct tpm_chip *chip, u8 *out, size_t max);
int tpm1_get_pcr_allocation(struct tpm_chip *chip);
unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
int tpm_pm_suspend(struct device *dev);
int tpm_pm_resume(struct device *dev);
......@@ -449,6 +450,7 @@ int tpm2_unseal_trusted(struct tpm_chip *chip,
ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
u32 *value, const char *desc);
ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip);
int tpm2_auto_startup(struct tpm_chip *chip);
void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
......
......@@ -699,18 +699,6 @@ int tpm1_auto_startup(struct tpm_chip *chip)
goto out;
}
chip->allocated_banks = kcalloc(1, sizeof(*chip->allocated_banks),
GFP_KERNEL);
if (!chip->allocated_banks) {
rc = -ENOMEM;
goto out;
}
chip->allocated_banks[0].alg_id = TPM_ALG_SHA1;
chip->allocated_banks[0].digest_size = hash_digest_size[HASH_ALGO_SHA1];
chip->allocated_banks[0].crypto_id = HASH_ALGO_SHA1;
chip->nr_allocated_banks = 1;
return rc;
out:
if (rc > 0)
......@@ -779,3 +767,27 @@ int tpm1_pm_suspend(struct tpm_chip *chip, u32 tpm_suspend_pcr)
return rc;
}
/**
* tpm1_get_pcr_allocation() - initialize the allocated bank
* @chip: TPM chip to use.
*
* The function initializes the SHA1 allocated bank to extend PCR
*
* Return:
* * 0 on success,
* * < 0 on error.
*/
int tpm1_get_pcr_allocation(struct tpm_chip *chip)
{
chip->allocated_banks = kcalloc(1, sizeof(*chip->allocated_banks),
GFP_KERNEL);
if (!chip->allocated_banks)
return -ENOMEM;
chip->allocated_banks[0].alg_id = TPM_ALG_SHA1;
chip->allocated_banks[0].digest_size = hash_digest_size[HASH_ALGO_SHA1];
chip->allocated_banks[0].crypto_id = HASH_ALGO_SHA1;
chip->nr_allocated_banks = 1;
return 0;
}
......@@ -840,7 +840,7 @@ struct tpm2_pcr_selection {
u8 pcr_select[3];
} __packed;
static ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip)
ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip)
{
struct tpm2_pcr_selection pcr_selection;
struct tpm_buf buf;
......@@ -1040,10 +1040,6 @@ int tpm2_auto_startup(struct tpm_chip *chip)
goto out;
}
rc = tpm2_get_pcr_allocation(chip);
if (rc)
goto out;
rc = tpm2_get_cc_attrs_tbl(chip);
out:
......
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