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ALSA: usb-audio: Fix the first PCM interface assignment 

In the new PCM streaming logic, the interface number is assigned to
usb stream instance (subs->interface) after the format and rate setups
are succeeded, but some codes are still passing subs->interface as the
reference to helper functions.  This leads to initializing with an
invalid iface number (-1).

This patch replaces the wrong references with the ones from the target
fmt correctly.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2012-07-06 08:11:43 +02:00
parent 8663ff75cd
commit 9e9b594661
1 changed files with 2 additions and 2 deletions
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4
sound/usb/pcm.c
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@ -387,7 +387,7 @@ add_sync_ep:
subs->data_endpoint->sync_master = subs->sync_endpoint; subs->data_endpoint->sync_master = subs->sync_endpoint;
} }
if ((err = snd_usb_init_pitch(subs->stream->chip, subs->interface, alts, fmt)) < 0) if ((err = snd_usb_init_pitch(subs->stream->chip, fmt->iface, alts, fmt)) < 0)
return err; return err;
subs->cur_audiofmt = fmt; subs->cur_audiofmt = fmt;
@ -450,7 +450,7 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream,
struct usb_interface *iface; struct usb_interface *iface;
iface = usb_ifnum_to_if(subs->dev, fmt->iface); iface = usb_ifnum_to_if(subs->dev, fmt->iface);
alts = &iface->altsetting[fmt->altset_idx]; alts = &iface->altsetting[fmt->altset_idx];
ret = snd_usb_init_sample_rate(subs->stream->chip, subs->interface, alts, fmt, rate); ret = snd_usb_init_sample_rate(subs->stream->chip, fmt->iface, alts, fmt, rate);
if (ret < 0) if (ret < 0)
return ret; return ret;
subs->cur_rate = rate; subs->cur_rate = rate;