Hello Jie Yang,
The patch e2cef68d5903: "ASoC: rt286: add jack detection disable with NULL jack passed" from Feb 10, 2015, leads to the following static checker warning:
sound/soc/codecs/rt286.c:400 rt286_mic_detect() warn: suspicious bitop condition
sound/soc/codecs/rt286.c 392 int rt286_mic_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack) 393 { 394 struct rt286_priv *rt286 = snd_soc_codec_get_drvdata(codec); 395 396 rt286->jack = jack; 397 398 if (jack) { 399 /* enable IRQ */ 400 if (rt286->jack->status | SND_JACK_HEADPHONE) ^^^^^^^^^^^^^^^^^^^^ You probably intended bitwise AND here? Bitwise OR is always true.
401 snd_soc_dapm_force_enable_pin(&codec->dapm, "LDO1"); 402 regmap_update_bits(rt286->regmap, RT286_IRQ_CTRL, 0x2, 0x2); 403 /* Send an initial empty report */ 404 snd_soc_jack_report(rt286->jack, rt286->jack->status, 405 SND_JACK_MICROPHONE | SND_JACK_HEADPHONE); 406 } else { 407 /* disable IRQ */ 408 regmap_update_bits(rt286->regmap, RT286_IRQ_CTRL, 0x2, 0x0); 409 snd_soc_dapm_disable_pin(&codec->dapm, "LDO1"); 410 } 411 snd_soc_dapm_sync(&codec->dapm); 412 413 return 0; 414 }
regards, dan carpenter