ALSA: usb-audio: Respond to suspend and resume callbacks for MIDI input
sound/usb/card.c registers USB suspend and resume but did not previously
kill the input URBs. This means that USB MIDI devices left open across
suspend/resume had non-functional input (output still usually worked,
but it looks like that is another issue). Before this change, we would
get ESHUTDOWN for each of the input URBs at suspend time, killing input.
Signed-off-by: Adam Goode <agoode@google.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/usb/card.c b/sound/usb/card.c
index a09e5f3..7ecd0e8 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -680,6 +680,7 @@
struct snd_usb_audio *chip = usb_get_intfdata(intf);
struct snd_usb_stream *as;
struct usb_mixer_interface *mixer;
+ struct list_head *p;
if (chip == (void *)-1L)
return 0;
@@ -692,6 +693,9 @@
as->substream[0].need_setup_ep =
as->substream[1].need_setup_ep = true;
}
+ list_for_each(p, &chip->midi_list) {
+ snd_usbmidi_suspend(p);
+ }
}
} else {
/*
@@ -713,6 +717,7 @@
{
struct snd_usb_audio *chip = usb_get_intfdata(intf);
struct usb_mixer_interface *mixer;
+ struct list_head *p;
int err = 0;
if (chip == (void *)-1L)
@@ -731,6 +736,10 @@
goto err_out;
}
+ list_for_each(p, &chip->midi_list) {
+ snd_usbmidi_resume(p);
+ }
+
if (!chip->autosuspended)
snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
chip->autosuspended = 0;