trivial: Explain overloaded context term

This confused me. It might confuse others.

Signed-off-by: Stephen Finucane <[email protected]>

Author: stephenfin

pkg/csi/cinder/controllerserver.go

@@ -211,7 +211,7 @@ func (cs *controllerServer) CreateVolume(ctx context.Context, req *csi.CreateVol
 	if affinity != "" || antiAffinity != "" {
 		klog.V(4).Infof("CreateVolume: Getting scheduler hints: affinity=%s, anti-affinity=%s", affinity, antiAffinity)
 
-		// resolve volume names to UUIDs
+		// Resolve volume names to UUIDs
 		affinity, err = cloud.ResolveVolumeListToUUIDs(ctx, affinity)
 		if err != nil {
 			return nil, status.Errorf(codes.InvalidArgument, "failed to resolve affinity volume UUIDs: %v", err)
@@ -221,6 +221,7 @@ func (cs *controllerServer) CreateVolume(ctx context.Context, req *csi.CreateVol
 			return nil, status.Errorf(codes.InvalidArgument, "failed to resolve anti-affinity volume UUIDs: %v", err)
 		}
 
+		// Note that this is context for the k8s CSI volume, not the Cinder volume
 		volCtx = util.SetMapIfNotEmpty(volCtx, "affinity", affinity)
 		volCtx = util.SetMapIfNotEmpty(volCtx, "anti-affinity", antiAffinity)
 		schedulerHints = &volumes.SchedulerHintOpts{