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ALSA: usb-audio: do not initialize and check implicit_fb 

Since implicit_fb is not changed, !implicit_fb will always
be true - it is set only after these checks.
Similarly, there's also no need to set it at the top of the function.

Change the type of implicit_fb to bool (more appropriate).

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Eldad Zack 2013-08-03 10:50:20 +02:00 committed by Takashi Iwai
parent f34d065013
commit 95fec88332
1 changed files with 3 additions and 5 deletions
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8
sound/usb/pcm.c
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@ -405,7 +405,7 @@ static int set_sync_endpoint(struct snd_usb_substream *subs,
{
int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
unsigned int ep, attr;
int implicit_fb = 0;
bool implicit_fb;
int err;
/* we need a sync pipe in async OUT or adaptive IN mode */
@ -432,8 +432,7 @@ static int set_sync_endpoint(struct snd_usb_substream *subs,
the audio fields in the endpoint descriptors */
if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC ||
(get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
get_endpoint(alts, 1)->bSynchAddress != 0 &&
!implicit_fb)) {
get_endpoint(alts, 1)->bSynchAddress != 0)) {
snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n",
dev->devnum, fmt->iface, fmt->altsetting,
get_endpoint(alts, 1)->bmAttributes,
@ -442,8 +441,7 @@ static int set_sync_endpoint(struct snd_usb_substream *subs,
return -EINVAL;
}
ep = get_endpoint(alts, 1)->bEndpointAddress;
if (!implicit_fb &&
get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
((is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
(!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n",