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ALSA: snd-hda-intel - add checks for invalid values to *query_supported_pcm()

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If ratesp or formatsp values are zero, wrong values are passed to ALSA's
the PCM midlevel code. The bug is showed more later than expected.

Also, clean a bit the code.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Jaroslav Kysela 2009-03-17 14:30:31 +01:00 committed by Takashi Iwai
parent b9591448e5
commit ee5047102c
1 changed files with 25 additions and 8 deletions
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33
sound/pci/hda/hda_codec.c
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@ -2539,12 +2539,11 @@ EXPORT_SYMBOL_HDA(snd_hda_calc_stream_format);
static int snd_hda_query_supported_pcm(struct hda_codec *codec, hda_nid_t nid,
u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
{
int i;
unsigned int val, streams;
unsigned int i, val, wcaps;
val = 0;
if (nid != codec->afg &&
(get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD)) {
wcaps = get_wcaps(codec, nid);
if (nid != codec->afg && (wcaps & AC_WCAP_FORMAT_OVRD)) {
val = snd_hda_param_read(codec, nid, AC_PAR_PCM);
if (val == -1)
return -EIO;
@ -2558,15 +2557,20 @@ static int snd_hda_query_supported_pcm(struct hda_codec *codec, hda_nid_t nid,
if (val & (1 << i))
rates |= rate_bits[i].alsa_bits;
}
if (rates == 0) {
snd_printk(KERN_ERR "hda_codec: rates == 0 "
"(nid=0x%x, val=0x%x, ovrd=%i)\n",
nid, val,
(wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
return -EIO;
}
*ratesp = rates;
}
if (formatsp || bpsp) {
u64 formats = 0;
unsigned int bps;
unsigned int wcaps;
unsigned int streams, bps;
wcaps = get_wcaps(codec, nid);
streams = snd_hda_param_read(codec, nid, AC_PAR_STREAM);
if (streams == -1)
return -EIO;
@ -2619,6 +2623,15 @@ static int snd_hda_query_supported_pcm(struct hda_codec *codec, hda_nid_t nid,
formats |= SNDRV_PCM_FMTBIT_U8;
bps = 8;
}
if (formats == 0) {
snd_printk(KERN_ERR "hda_codec: formats == 0 "
"(nid=0x%x, val=0x%x, ovrd=%i, "
"streams=0x%x)\n",
nid, val,
(wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
streams);
return -EIO;
}
if (formatsp)
*formatsp = formats;
if (bpsp)
@ -2734,12 +2747,16 @@ static int hda_pcm_default_cleanup(struct hda_pcm_stream *hinfo,
static int set_pcm_default_values(struct hda_codec *codec,
struct hda_pcm_stream *info)
{
int err;
/* query support PCM information from the given NID */
if (info->nid && (!info->rates || !info->formats)) {
snd_hda_query_supported_pcm(codec, info->nid,
err = snd_hda_query_supported_pcm(codec, info->nid,
info->rates ? NULL : &info->rates,
info->formats ? NULL : &info->formats,
info->maxbps ? NULL : &info->maxbps);
if (err < 0)
return err;
}
if (info->ops.open == NULL)
info->ops.open = hda_pcm_default_open_close;