struct hdmi_spec_per_cvt {
        hda_nid_t cvt_nid;
-       int assigned;
+       bool assigned;          /* the stream has been assigned */
        unsigned int channels_min;
        unsigned int channels_max;
        u32 rates;
                return err;
 
        per_cvt = get_cvt(spec, cvt_idx);
-       per_cvt->assigned = 1;
+       per_cvt->assigned = true;
        hinfo->nid = per_cvt->cvt_nid;
 
        pin_cvt_fixup(codec, NULL, per_cvt->cvt_nid);
 
        per_cvt = get_cvt(spec, cvt_idx);
        /* Claim converter */
-       per_cvt->assigned = 1;
+       per_cvt->assigned = true;
 
        set_bit(pcm_idx, &spec->pcm_in_use);
        per_pin = get_pin(spec, pin_idx);
                snd_hdmi_eld_update_pcm_info(&eld->info, hinfo);
                if (hinfo->channels_min > hinfo->channels_max ||
                    !hinfo->rates || !hinfo->formats) {
-                       per_cvt->assigned = 0;
+                       per_cvt->assigned = false;
                        hinfo->nid = 0;
                        snd_hda_spdif_ctls_unassign(codec, pcm_idx);
                        err = -ENODEV;
        }
 
        per_cvt = get_cvt(spec, cvt_idx);
-       per_cvt->assigned = 1;
+       per_cvt->assigned = true;
        per_pin->cvt_nid = per_cvt->cvt_nid;
        per_pin->silent_stream = true;
 
        cvt_idx = cvt_nid_to_cvt_index(codec, per_pin->cvt_nid);
        if (cvt_idx >= 0 && cvt_idx < spec->num_cvts) {
                per_cvt = get_cvt(spec, cvt_idx);
-               per_cvt->assigned = 0;
+               per_cvt->assigned = false;
        }
 
        if (spec->silent_stream_type == SILENT_STREAM_I915) {
                        goto unlock;
                }
                per_cvt = get_cvt(spec, cvt_idx);
-               per_cvt->assigned = 0;
+               per_cvt->assigned = false;
                hinfo->nid = 0;
 
                azx_stream(get_azx_dev(substream))->stripe = 0;