From 6373b35536e459da45cd3ad5aa6b4d8ce08254e9 Mon Sep 17 00:00:00 2001
From: Hemant Kumar <hemantk@codeaurora.org>
Date: Fri, 1 Apr 2016 19:13:01 -0700
Subject: [PATCH] sound: usb: Enable autosuspend for usb audio device

This allows runtime suspend to kick in upon all the
children of usb device are suspended. It saves power
when usb audio device is connected but not data transfer
is taking place.

CRs-Fixed: 1003807
Change-Id: I227a74c029f10ffda9ceccc10322ad71e7fd0435
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
---
 sound/usb/card.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/usb/card.c b/sound/usb/card.c
index e94f4d2f2620..524688e4c144 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -643,6 +643,7 @@ static int usb_audio_probe(struct usb_interface *intf,
 	usb_chip[chip->index] = chip;
 	chip->num_interfaces++;
 	usb_set_intfdata(intf, chip);
+	usb_enable_autosuspend(chip->dev);
 	atomic_dec(&chip->active);
 	mutex_unlock(&register_mutex);
 	return 0;