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Commit ec75a940 authored by Libin Yang's avatar Libin Yang Committed by Takashi Iwai
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ALSA: hda - hdmi add wmb barrier for audio component 



To make sure audio_ptr is set before intel_audio_codec_enable()
or intel_audio_codec_disable() calling pin_eld_notify(),
this patch adds wmb barrier to prevent optimizing.

Signed-off-by: default avatarLibin Yang <libin.yang@linux.intel.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 02322ac9

sound/pci/hda/patch_hdmi.c

+5 −0
Original line number Diff line number Diff line
@@ -2480,6 +2480,11 @@ static int patch_generic_hdmi(struct hda_codec *codec) 
	if (codec_has_acomp(codec)) {

		codec->depop_delay = 0;

		spec->i915_audio_ops.audio_ptr = codec;

		/* intel_audio_codec_enable() or intel_audio_codec_disable()

		 * will call pin_eld_notify with using audio_ptr pointer

		 * We need make sure audio_ptr is really setup

		 */

		wmb();

		spec->i915_audio_ops.pin_eld_notify = intel_pin_eld_notify;

		snd_hdac_i915_register_notifier(&spec->i915_audio_ops);

	}