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ALSA: usbaudio: fix suspend/resume 

- ESHUTDOWN must be correctly handled
- the optional interrupt endpoint's URB must be stopped and restarted

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Oliver Neukum 2011-03-11 13:19:43 +01:00 committed by Takashi Iwai
parent cc99a0861f
commit edf7de31c2
3 changed files with 34 additions and 3 deletions
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10
sound/usb/card.c
View File

@ -586,6 +586,7 @@ static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
struct snd_usb_audio *chip = usb_get_intfdata(intf);
struct list_head *p;
struct snd_usb_stream *as;
struct usb_mixer_interface *mixer;
if (chip == (void *)-1L)
return 0;
@ -596,6 +597,10 @@ static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
as = list_entry(p, struct snd_usb_stream, list);
snd_pcm_suspend_all(as->pcm);
}
list_for_each_entry(mixer, &chip->mixer_list, list) {
snd_usb_mixer_inactivate(mixer);
}
}
return 0;
@ -604,6 +609,7 @@ static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
static int usb_audio_resume(struct usb_interface *intf)
{
struct snd_usb_audio *chip = usb_get_intfdata(intf);
struct usb_mixer_interface *mixer;
if (chip == (void *)-1L)
return 0;
@ -611,8 +617,10 @@ static int usb_audio_resume(struct usb_interface *intf)
return 0;
/*
* ALSA leaves material resumption to user space
* we just notify
* we just notify and restart the mixers
*/
list_for_each_entry(mixer, &chip->mixer_list, list)
snd_usb_mixer_activate(mixer);
snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);

25
sound/usb/mixer.c
View File

@ -2075,8 +2075,9 @@ static void snd_usb_mixer_interrupt(struct urb *urb)
{
struct usb_mixer_interface *mixer = urb->context;
int len = urb->actual_length;
int ustatus = urb->status;
if (urb->status != 0)
if (ustatus != 0)
goto requeue;
if (mixer->protocol == UAC_VERSION_1) {
@ -2117,12 +2118,32 @@ static void snd_usb_mixer_interrupt(struct urb *urb)
}
requeue:
if (urb->status != -ENOENT && urb->status != -ECONNRESET) {
if (ustatus != -ENOENT && ustatus != -ECONNRESET && ustatus != -ESHUTDOWN) {
urb->dev = mixer->chip->dev;
usb_submit_urb(urb, GFP_ATOMIC);
}
}
/* stop any bus activity of a mixer */
void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer)
{
usb_kill_urb(mixer->urb);
usb_kill_urb(mixer->rc_urb);
}
int snd_usb_mixer_activate(struct usb_mixer_interface *mixer)
{
int err;
if (mixer->urb) {
err = usb_submit_urb(mixer->urb, GFP_NOIO);
if (err < 0)
return err;
}
return 0;
}
/* create the handler for the optional status interrupt endpoint */
static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
{

2
sound/usb/mixer.h
View File

@ -52,5 +52,7 @@ void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
int request, int validx, int value_set);
void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer);
int snd_usb_mixer_activate(struct usb_mixer_interface *mixer);
#endif /* __USBMIXER_H */