[3.19.y-ckt stable] Patch "ALSA: hda - Fix mute-LED fixed mode" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    ALSA: hda - Fix mute-LED fixed mode

to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue

This patch is scheduled to be released in version 3.19.8-ckt1.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

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>From 055ec0dced2d5a3260d9ec9ec50af749bbf4df3a Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai at suse.de>
Date: Mon, 27 Apr 2015 10:36:11 +0200
Subject: ALSA: hda - Fix mute-LED fixed mode
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

commit ee52e56e7b12834476cd0031c5986254ba1b6317 upstream.

The mute-LED mode control has the fixed on/off states that are
supposed to remain on/off regardless of the master switch.  However,
this doesn't work actually because the vmaster hook is called in the
vmaster code itself.

This patch fixes it by calling the hook indirectly after checking the
mute LED mode.

Reported-and-tested-by: Pali Rohár <pali.rohar at gmail.com>
Signed-off-by: Takashi Iwai <tiwai at suse.de>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 sound/pci/hda/hda_codec.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 2fe86d2..a63a863 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -3027,6 +3027,16 @@ static struct snd_kcontrol_new vmaster_mute_mode = {
 	.put = vmaster_mute_mode_put,
 };

+/* meta hook to call each driver's vmaster hook */
+static void vmaster_hook(void *private_data, int enabled)
+{
+	struct hda_vmaster_mute_hook *hook = private_data;
+
+	if (hook->mute_mode != HDA_VMUTE_FOLLOW_MASTER)
+		enabled = hook->mute_mode;
+	hook->hook(hook->codec, enabled);
+}
+
 /**
  * snd_hda_add_vmaster_hook - Add a vmaster hook for mute-LED
  * @codec: the HDA codec
@@ -3045,9 +3055,9 @@ int snd_hda_add_vmaster_hook(struct hda_codec *codec,

 	if (!hook->hook || !hook->sw_kctl)
 		return 0;
-	snd_ctl_add_vmaster_hook(hook->sw_kctl, hook->hook, codec);
 	hook->codec = codec;
 	hook->mute_mode = HDA_VMUTE_FOLLOW_MASTER;
+	snd_ctl_add_vmaster_hook(hook->sw_kctl, vmaster_hook, hook);
 	if (!expose_enum_ctl)
 		return 0;
 	kctl = snd_ctl_new1(&vmaster_mute_mode, hook);
@@ -3073,14 +3083,7 @@ void snd_hda_sync_vmaster_hook(struct hda_vmaster_mute_hook *hook)
 	 */
 	if (hook->codec->bus->shutdown)
 		return;
-	switch (hook->mute_mode) {
-	case HDA_VMUTE_FOLLOW_MASTER:
-		snd_ctl_sync_vmaster_hook(hook->sw_kctl);
-		break;
-	default:
-		hook->hook(hook->codec, hook->mute_mode);
-		break;
-	}
+	snd_ctl_sync_vmaster_hook(hook->sw_kctl);
 }
 EXPORT_SYMBOL_GPL(snd_hda_sync_vmaster_hook);

--
1.9.1