}
                break;
        default:
-               WARN_ON_ONCE(1);
+               WARN_ONCE(1, "Invalid chanspec 0x%04x\n", ch->chspec);
                break;
        }
 
                ch->band = BRCMU_CHAN_BAND_2G;
                break;
        default:
-               WARN_ON_ONCE(1);
+               WARN_ONCE(1, "Invalid chanspec 0x%04x\n", ch->chspec);
                break;
        }
 }
                        ch->sb = BRCMU_CHAN_SB_U;
                        ch->control_ch_num += CH_10MHZ_APART;
                } else {
-                       WARN_ON_ONCE(1);
+                       WARN_ONCE(1, "Invalid chanspec 0x%04x\n", ch->chspec);
                }
                break;
        case BRCMU_CHSPEC_D11AC_BW_80:
                        ch->control_ch_num += CH_30MHZ_APART;
                        break;
                default:
-                       WARN_ON_ONCE(1);
+                       WARN_ONCE(1, "Invalid chanspec 0x%04x\n", ch->chspec);
                        break;
                }
                break;
                        ch->control_ch_num += CH_70MHZ_APART;
                        break;
                default:
-                       WARN_ON_ONCE(1);
+                       WARN_ONCE(1, "Invalid chanspec 0x%04x\n", ch->chspec);
                        break;
                }
                break;
        case BRCMU_CHSPEC_D11AC_BW_8080:
        default:
-               WARN_ON_ONCE(1);
+               WARN_ONCE(1, "Invalid chanspec 0x%04x\n", ch->chspec);
                break;
        }
 
                ch->band = BRCMU_CHAN_BAND_2G;
                break;
        default:
-               WARN_ON_ONCE(1);
+               WARN_ONCE(1, "Invalid chanspec 0x%04x\n", ch->chspec);
                break;
        }
 }