[PATCH 3/3] sound: usb: allow interfaces that the driver claims to autosuspend

[Yueyao Zhu]

From: Yueyao Zhu <yue...@google.com>

Instead of calling usb_enable_autosuspend() to change the configuration
of a USB device as an interface driver, enable autosuspend for every
interfaces that the driver claims.

Signed-off-by: Yueyao Zhu <yue...@google.com>
---
 sound/usb/card.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/usb/card.c b/sound/usb/card.c
index 6640277a725b..79bec2883740 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -184,6 +184,7 @@ static int snd_usb_create_stream(struct snd_usb_audio 
*chip, int ctrlif, int int
                        return -EINVAL;
                }
                usb_driver_claim_interface(&usb_audio_driver, iface, (void 
*)-1L);
+               usb_allow_interface_autosuspend(iface);
 
                return 0;
        }
@@ -206,6 +207,7 @@ static int snd_usb_create_stream(struct snd_usb_audio 
*chip, int ctrlif, int int
        if (! snd_usb_parse_audio_interface(chip, interface)) {
                usb_set_interface(dev, interface, 0); /* reset the current 
interface */
                usb_driver_claim_interface(&usb_audio_driver, iface, (void 
*)-1L);
+               usb_allow_interface_autosuspend(iface);
        }
 
        return 0;
@@ -618,6 +620,7 @@ static int usb_audio_probe(struct usb_interface *intf,
        usb_chip[chip->index] = chip;
        chip->num_interfaces++;
        usb_set_intfdata(intf, chip);
+       usb_allow_interface_autosuspend(intf);
        atomic_dec(&chip->active);
        mutex_unlock(&register_mutex);
        return 0;
-- 
2.13.0.506.g27d5fe0cd-goog

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