Re: [PATCH v5 08/17] tpm: access command header through struct in tpm_try_transmit()

[Stefan Berger]

On 11/8/18 9:15 AM, Jarkko Sakkinen wrote:
> 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>

Reviewed-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>


> ---
>   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 6abbcedc87a3..f2280bf15339 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->ordinal);
>   	if (count == 0)
>   		return -ENODATA;
>   	if (count > bufsiz) {