Hello Takashi Iwai,
The patch 1077a024812d: "ALSA: hda - Use generic parser for Cirrus codec driver" from Dec 19, 2012, leads to the following static checker warning:
sound/pci/hda/patch_cirrus.c:1004 cs4210_spdif_automute() warn: we tested 'spdif_present' before and it was 'true'
sound/pci/hda/patch_cirrus.c 984 static void cs4210_spdif_automute(struct hda_codec *codec, 985 struct hda_jack_callback *tbl) 986 { 987 struct cs_spec *spec = codec->spec; 988 bool spdif_present = false; 989 hda_nid_t spdif_pin = spec->gen.autocfg.dig_out_pins[0]; 990 991 /* detect on spdif is specific to CS4210 */ 992 if (!spec->spdif_detect || 993 spec->vendor_nid != CS4210_VENDOR_NID) 994 return; 995 996 spdif_present = snd_hda_jack_detect(codec, spdif_pin); 997 if (spdif_present == spec->spdif_present) 998 return; 999 1000 spec->spdif_present = spdif_present; 1001 /* SPDIF TX on/off */ 1002 if (spdif_present) ^^^^^^^^^^^^^ 1003 snd_hda_set_pin_ctl(codec, spdif_pin, 1004 spdif_present ? PIN_OUT : 0); ^^^^^^^^^^^^^
I'm not positive but I think this is buggy. We should remove the if statement.
1005 1006 cs_automute(codec); 1007 }
regards, dan carpenter