[PATCH v5 02/17] tpm: Remove tpm_send()

James Bottomley
2023-11-27T19:10:01Z

From: Jarkko Sakkinen <jarkko@kernel.org>

Open code the last remaining call site for tpm_send().

Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
---
drivers/char/tpm/tpm-interface.c | 25 -----------------------
include/linux/tpm.h | 5 -----
security/keys/trusted-keys/trusted_tpm1.c | 14 +++++++++++--
3 files changed, 12 insertions(+), 32 deletions(-)

diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 66b16d26eecc..163ae247bff2 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -342,31 +342,6 @@ int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,
}
EXPORT_SYMBOL_GPL(tpm_pcr_extend);

-/**
- * tpm_send - send a TPM command
- * @chip: a &struct tpm_chip instance, %NULL for the default chip
- * @cmd: a TPM command buffer
- * @buflen: the length of the TPM command buffer
- *
- * Return: same as with tpm_transmit_cmd()
- */
-int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen)
-{
- struct tpm_buf buf;
- int rc;
-
- chip = tpm_find_get_ops(chip);
- if (!chip)
- return -ENODEV;
-
- buf.data = cmd;
- rc = tpm_transmit_cmd(chip, &buf, 0, "attempting to a send a command");
-
- tpm_put_ops(chip);
- return rc;
-}
-EXPORT_SYMBOL_GPL(tpm_send);
-
int tpm_auto_startup(struct tpm_chip *chip)
{
int rc;
diff --git a/include/linux/tpm.h b/include/linux/tpm.h
index 6588ca87cf93..d9d645e9c52c 100644
--- a/include/linux/tpm.h
+++ b/include/linux/tpm.h
@@ -422,7 +422,6 @@ extern int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx,
struct tpm_digest *digest);
extern int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,
struct tpm_digest *digests);
-extern int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen);
extern int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max);
extern struct tpm_chip *tpm_default_chip(void);
void tpm2_flush_context(struct tpm_chip *chip, u32 handle);
@@ -443,10 +442,6 @@ static inline int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,
return -ENODEV;
}

-static inline int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen)
-{
- return -ENODEV;
-}
static inline int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max)
{
return -ENODEV;
diff --git a/security/keys/trusted-keys/trusted_tpm1.c b/security/keys/trusted-keys/trusted_tpm1.c
index aa108bea6739..37bce84eef99 100644
--- a/security/keys/trusted-keys/trusted_tpm1.c
+++ b/security/keys/trusted-keys/trusted_tpm1.c
@@ -356,17 +356,27 @@ static int TSS_checkhmac2(unsigned char *buffer,
*/
int trusted_tpm_send(unsigned char *cmd, size_t buflen)
{
+ struct tpm_buf buf;
int rc;

if (!chip)
return -ENODEV;

+ rc = tpm_try_get_ops(chip);
+ if (rc)
+ return rc;
+
+ buf.flags = 0;
+ buf.data = cmd;
dump_tpm_buf(cmd);
- rc = tpm_send(chip, cmd, buflen);
+ rc = tpm_transmit_cmd(chip, &buf, 4, "sending data");
dump_tpm_buf(cmd);
+
if (rc > 0)
- /* Can't return positive return codes values to keyctl */
+ /* TPM error */
rc = -EPERM;
+
+ tpm_put_ops(chip);
return rc;
}
EXPORT_SYMBOL_GPL(trusted_tpm_send);
--
2.35.3