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[ALSA] usbaudio - Revert the minimal period size fix patch 

The last patch didn't really work (false report).
Although the hardware supports 125us minimum period, the current
usb-audio driver code assumes the 1ms period in many places.
Rollback the change.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Takashi Iwai 2007-05-03 12:26:14 +02:00 committed by Jaroslav Kysela
parent 4d69d756d1
commit 81c4899f7e
1 changed files with 4 additions and 3 deletions
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7
sound/usb/usbaudio.c
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@ -1878,10 +1878,11 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre
}
/* set the period time minimum 1ms */
/* FIXME: high-speed mode allows 125us minimum period, but many parts
* in the current code assume the 1ms period.
*/
snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
snd_usb_get_speed(subs->dev) == USB_SPEED_FULL ?
1000 * MIN_PACKS_URB : 125 * MIN_PACKS_URB,
1000 * MIN_PACKS_URB,
/*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
if (check_hw_params_convention(subs)) {