Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=81c4899f7ef3675fdc574de2671ff9fa45996cc5
Commit:     81c4899f7ef3675fdc574de2671ff9fa45996cc5
Parent:     4d69d756d19a4f457749f3667ad7fc8984bba15c
Author:     Takashi Iwai <[EMAIL PROTECTED]>
AuthorDate: Thu May 3 12:26:14 2007 +0200
Committer:  Jaroslav Kysela <[EMAIL PROTECTED]>
CommitDate: Fri May 11 16:56:14 2007 +0200

    [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 <[EMAIL PROTECTED]>
    Signed-off-by: Jaroslav Kysela <[EMAIL PROTECTED]>
---
 sound/usb/usbaudio.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index 78efcff..8ebc1ad 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -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)) {
-
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