From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 4 Dec 2012 16:01:25 +0000 (+0100)
Subject: ALSA: hda - Avoid doubly suspend after vga switcheroo
X-Git-Tag: omap-for-v3.8/fixes-for-merge-window-v4-signed~39^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c5c215232dfb71d1cf2cc8627bdc2206726aa8a3;p=pandora-kernel.git

ALSA: hda - Avoid doubly suspend after vga switcheroo

The HD-audio driver artificially calls the suspend and the resume code
path in the VGA switcheroo state changes.  When a machine goes to
suspend, it tries to suspend the device again, and it stalls at
snd_power_wait().

This patch adds checks whether the devices were already in (forced)
suspend in PM callbacks for avoiding the doubly suspend.

Reported-by: Daniel J Blueman <daniel@quora.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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