Hello Everybody,
when i'm upgrade ubuntu to the ubuntu 13.04 , this bug is also exists.
but when i'm edit "sound/pci/cs46xx/dsp_spos.c" function "int
cs46xx_dsp_resume(struct snd_cs46xx * chip) "
old code:
int cs46xx_dsp_resume(struct snd_cs46xx * chip)
{
struct dsp_spos_instance * ins = chip->dsp_spos_instance;
int i, err;
/* clear parameter, sample and code areas */
snd_cs46xx_clear_BA1(chip, DSP_PARAMETER_BYTE_OFFSET,
DSP_PARAMETER_BYTE_SIZE);
snd_cs46xx_clear_BA1(chip, DSP_SAMPLE_BYTE_OFFSET,
DSP_SAMPLE_BYTE_SIZE);
snd_cs46xx_clear_BA1(chip, DSP_CODE_BYTE_OFFSET, DSP_CODE_BYTE_SIZE);
ignore some code here.......
if (chip->dsp_spos_instance->spdif_status_in) {
cs46xx_poke_via_dsp(chip, SP_ASER_COUNTDOWN, 0x80000005);
cs46xx_poke_via_dsp(chip, SP_SPDIN_CONTROL, 0x800003ff);
}
return 0;
}
now:
int cs46xx_dsp_resume(struct snd_cs46xx * chip)
{
struct dsp_spos_instance * ins = chip->dsp_spos_instance;
int i, err;
mutex_lock(&chip->spos_mutex);
/* clear parameter, sample and code areas */
snd_cs46xx_clear_BA1(chip, DSP_PARAMETER_BYTE_OFFSET,
DSP_PARAMETER_BYTE_SIZE);
snd_cs46xx_clear_BA1(chip, DSP_SAMPLE_BYTE_OFFSET,
DSP_SAMPLE_BYTE_SIZE);
snd_cs46xx_clear_BA1(chip, DSP_CODE_BYTE_OFFSET, DSP_CODE_BYTE_SIZE);
ignore some code here.......
if (chip->dsp_spos_instance->spdif_status_in) {
cs46xx_poke_via_dsp(chip, SP_ASER_COUNTDOWN, 0x80000005);
cs46xx_poke_via_dsp(chip, SP_SPDIN_CONTROL, 0x800003ff);
}
mutex_unlock(&chip->spos_mutex);
return 0;
}
now the bug fixed,the sound card can works , so i think this function
"int cs46xx_dsp_resume(struct snd_cs46xx * chip) " need to add a lock 。
** Tags removed: kernel-fixed-upstream
** Tags added: kernel-bug-exists-upstream
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https://bugs.launchpad.net/bugs/1157525
Title:
snd-cs46xx don't work at linux 3.2.0-39-generic
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