[PATCH 5/9] drm/display/dp_mst: Fix the payload VCPI check in drm_dp_mst_dump_topology()

[Ville Syrjälä]

On Wed, Jan 25, 2023 at 01:48:48PM +0200, Imre Deak wrote:
> Fix an off-by-one error in the VCPI check in drm_dp_mst_dump_topology().
> 
> Cc: Lyude Paul <lyude at redhat.com>
> Cc: dri-devel at lists.freedesktop.org
> Signed-off-by: Imre Deak <imre.deak at intel.com>
> ---
>  drivers/gpu/drm/display/drm_dp_mst_topology.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology.c b/drivers/gpu/drm/display/drm_dp_mst_topology.c
> index 81cc0c3b1e000..619f616d69e20 100644
> --- a/drivers/gpu/drm/display/drm_dp_mst_topology.c
> +++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c
> @@ -4770,7 +4770,7 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
>  		list_for_each_entry(payload, &state->payloads, next) {
>  			char name[14];
>  
> -			if (payload->vcpi != i || payload->delete)
> +			if (payload->vcpi != i + 1 || payload->delete)

Why does this code even do that funny nested double loop?

>  				continue;
>  
>  			fetch_monitor_name(mgr, payload->port, name, sizeof(name));
> -- 
> 2.37.1

-- 
Ville Syrjälä
Intel