[PATCH] tpm: access command header through struct in tpm_try_transmit()

From: Jarkko Sakkinen
Date: Fri Nov 02 2018 - 20:34:35 EST


Instead of accessing fields of the command header through offsets to
the raw buffer, it is a better idea to use the header struct pointer
that is already used elsewhere in the function.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
---
drivers/char/tpm/tpm-interface.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 967de254b156..dd97a17243e3 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -190,8 +190,8 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip,
if (bufsiz > TPM_BUFSIZE)
bufsiz = TPM_BUFSIZE;

- count = be32_to_cpu(*((__be32 *) (buf + 2)));
- ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
+ count = be32_to_cpu(header->length);
+ ordinal = be32_to_cpu(header->return_code);
if (count == 0)
return -ENODATA;
if (count > bufsiz) {
--
2.19.1