Patch "ALSA: hda: Drop useless WARN_ON()" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

ALSA: hda: Drop useless WARN_ON()

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
alsa-hda-drop-useless-warn_on.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Takashi Iwai <[email protected]>
Date: Fri, 22 Dec 2017 10:45:07 +0100
Subject: ALSA: hda: Drop useless WARN_ON()

From: Takashi Iwai <[email protected]>

commit a36c2638380c0a4676647a1f553b70b20d3ebce1 upstream.

Since the commit 97cc2ed27e5a ("ALSA: hda - Fix yet another i915 pointer leftover in error path") cleared hdac_acomp pointer, the WARN_ON() non-NULL check in snd_hdac_i915_register_notifier() may give a false-positive warning, as the function gets called no matter whether the component is registered or not. For fixing it, let's get rid of the spurious WARN_ON().

---
 sound/hda/hdac_i915.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -319,7 +319,7 @@ static int hdac_component_master_match(s
  */
 int snd_hdac_i915_register_notifier(const struct i915_audio_component_audio_ops *aops)
 {
-	if (WARN_ON(!hdac_acomp))
+	if (!hdac_acomp)
 		return -ENODEV;
 
 	hdac_acomp->audio_ops = aops;

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/alsa-hda-drop-useless-warn_on.patch queue-4.9/alsa-hda-fix-headset-mic-detection-issue-on-a-dell-machine.patch