Since the number of handles is fixed to a single handle, eliminate all uses of buf->handles and deduce values during compile-time.
Signed-off-by: Jarkko Sakkinen <[email protected]> --- v2: - Streamline the code change and remove dead code. --- drivers/char/tpm/tpm-buf.c | 23 ----------------------- drivers/char/tpm/tpm2-cmd.c | 2 +- drivers/char/tpm/tpm2-sessions.c | 14 ++------------ include/linux/tpm.h | 2 -- 4 files changed, 3 insertions(+), 38 deletions(-) diff --git a/drivers/char/tpm/tpm-buf.c b/drivers/char/tpm/tpm-buf.c index dc882fc9fa9e..1d2b87455d3a 100644 --- a/drivers/char/tpm/tpm-buf.c +++ b/drivers/char/tpm/tpm-buf.c @@ -44,7 +44,6 @@ void tpm_buf_reset(struct tpm_buf *buf, u16 tag, u32 ordinal) head->tag = cpu_to_be16(tag); head->length = cpu_to_be32(sizeof(*head)); head->ordinal = cpu_to_be32(ordinal); - buf->handles = 0; } EXPORT_SYMBOL_GPL(tpm_buf_reset); @@ -146,26 +145,6 @@ void tpm_buf_append_u32(struct tpm_buf *buf, const u32 value) } EXPORT_SYMBOL_GPL(tpm_buf_append_u32); -/** - * tpm_buf_append_handle() - Add a handle - * @chip: &tpm_chip instance - * @buf: &tpm_buf instance - * @handle: a TPM object handle - * - * Add a handle to the buffer, and increase the count tracking the number of - * handles in the command buffer. Works only for command buffers. - */ -void tpm_buf_append_handle(struct tpm_chip *chip, struct tpm_buf *buf, u32 handle) -{ - if (buf->flags & TPM_BUF_TPM2B) { - dev_err(&chip->dev, "Invalid buffer type (TPM2B)\n"); - return; - } - - tpm_buf_append_u32(buf, handle); - buf->handles++; -} - /** * tpm_buf_read() - Read from a TPM buffer * @buf: &tpm_buf instance @@ -242,5 +221,3 @@ u32 tpm_buf_read_u32(struct tpm_buf *buf, off_t *offset) return be32_to_cpu(value); } EXPORT_SYMBOL_GPL(tpm_buf_read_u32); - - diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 461e85c3abe5..8ba6cd6819f1 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -210,7 +210,7 @@ int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, } tpm_buf_append_hmac_session(chip, &buf, 0, NULL, 0); } else { - tpm_buf_append_handle(chip, &buf, pcr_idx); + tpm_buf_append_u32(&buf, pcr_idx); tpm_buf_append_auth(chip, &buf, NULL, 0); } diff --git a/drivers/char/tpm/tpm2-sessions.c b/drivers/char/tpm/tpm2-sessions.c index 98cea20040cf..016bed63a755 100644 --- a/drivers/char/tpm/tpm2-sessions.c +++ b/drivers/char/tpm/tpm2-sessions.c @@ -268,7 +268,7 @@ int tpm_buf_append_name(struct tpm_chip *chip, struct tpm_buf *buf, } if (!tpm2_chip_auth(chip)) { - tpm_buf_append_handle(chip, buf, handle); + tpm_buf_append_u32(buf, handle); return 0; } @@ -295,17 +295,7 @@ EXPORT_SYMBOL_GPL(tpm_buf_append_name); void tpm_buf_append_auth(struct tpm_chip *chip, struct tpm_buf *buf, u8 *passphrase, int passphrase_len) { - /* offset tells us where the sessions area begins */ - int offset = buf->handles * 4 + TPM_HEADER_SIZE; - u32 len = 9 + passphrase_len; - - if (tpm_buf_length(buf) != offset) { - /* not the first session so update the existing length */ - len += get_unaligned_be32(&buf->data[offset]); - put_unaligned_be32(len, &buf->data[offset]); - } else { - tpm_buf_append_u32(buf, len); - } + tpm_buf_append_u32(buf, 9 + passphrase_len); /* auth handle */ tpm_buf_append_u32(buf, TPM2_RS_PW); /* nonce */ diff --git a/include/linux/tpm.h b/include/linux/tpm.h index 72610f1aa402..4a6ba16a962c 100644 --- a/include/linux/tpm.h +++ b/include/linux/tpm.h @@ -397,7 +397,6 @@ struct tpm_buf { u32 flags; u32 length; u8 *data; - u8 handles; }; enum tpm2_object_attributes { @@ -441,7 +440,6 @@ void tpm_buf_append_u32(struct tpm_buf *buf, const u32 value); u8 tpm_buf_read_u8(struct tpm_buf *buf, off_t *offset); u16 tpm_buf_read_u16(struct tpm_buf *buf, off_t *offset); u32 tpm_buf_read_u32(struct tpm_buf *buf, off_t *offset); -void tpm_buf_append_handle(struct tpm_chip *chip, struct tpm_buf *buf, u32 handle); /* * Check if TPM device is in the firmware upgrade mode. -- 2.39.5
