[Intel-gfx] [PATCH v4 10/16] misc/mei/hdcp: Fix AUTH_STREAM_REQ cmd buffer len

[Ramalingam C]

On 2020-10-27 at 22:12:02 +0530, Anshuman Gupta wrote:
> Fix the size of WIRED_REPEATER_AUTH_STREAM_REQ cmd buffer size.
> It is based upon the actual number of MST streams and size
> of wired_cmd_repeater_auth_stream_req_in.
> Excluding the size of hdcp_cmd_header.
> 
> v2:
> hdcp_cmd_header size annotation nitpick. [Tomas]
> 
> Cc: Tomas Winkler <tomas.winkler at intel.com>
> Cc: Ramalingam C <ramalingam.c at intel.com>
> Acked-by: Tomas Winkler <tomas.winkler at intel.com>
> Reviewed-by: Uma Shankar <uma.shankar at intel.com>
> Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
> ---
>  drivers/misc/mei/hdcp/mei_hdcp.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
> index 9ae9669e46ea..3506a3534294 100644
> --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> @@ -569,8 +569,7 @@ static int mei_hdcp_verify_mprime(struct device *dev,
>  	verify_mprime_in->header.api_version = HDCP_API_VERSION;
>  	verify_mprime_in->header.command_id = WIRED_REPEATER_AUTH_STREAM_REQ;
>  	verify_mprime_in->header.status = ME_HDCP_STATUS_SUCCESS;
> -	verify_mprime_in->header.buffer_len =
> -			WIRED_CMD_BUF_LEN_REPEATER_AUTH_STREAM_REQ_MIN_IN;
> +	verify_mprime_in->header.buffer_len = cmd_size  - sizeof(verify_mprime_in->header);
since only this packet is varying in size we need to calculate in
runtime.

Reviewed-by: Ramalingam C <ramalingam.c at intel.com>
>  
>  	verify_mprime_in->port.integrated_port_type = data->port_type;
>  	verify_mprime_in->port.physical_port = (u8)data->fw_ddi;
> -- 
> 2.26.2
>