Re: [PATCH][next] drm/i915/hdcp: Fix return of value in uninitialized variable ret

[Jani Nikula]

On Fri, 22 Jan 2021, Colin King <colin.king@xxxxxxxxxxxxx> wrote:
> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
>
> Currently when there are other connectors on the port using HDCP the
> function _intel_hdcp_disable returns a garbage uninitialized value in
> variable ret.  I believe the intention is to return 0, so return this
> literal value instead of the value in ret.
>
> Addresses-Coverity: ("Uninitialized scalar return")
> Fixes: 899c8762f981 ("drm/i915/hdcp: Configure HDCP2.2 MST steram encryption status")
> Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>

Thanks, but there's already a fix in progress:

http://lore.kernel.org/r/20210119064655.1605-3-anshuman.gupta@xxxxxxxxx

BR,
Jani.


> ---
>  drivers/gpu/drm/i915/display/intel_hdcp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
> index db8dff2eeb0a..a0e7b0bf892b 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> @@ -883,7 +883,7 @@ static int _intel_hdcp_disable(struct intel_connector *connector)
>  	 * until it disabled HDCP encryption for all connectors in MST topology.
>  	 */
>  	if (dig_port->num_hdcp_streams > 0)
> -		return ret;
> +		return 0;
>  
>  	hdcp->hdcp_encrypted = false;
>  	intel_de_write(dev_priv, HDCP_CONF(dev_priv, cpu_transcoder, port), 0);

-- 
Jani Nikula, Intel Open Source Graphics Center