Patch "ALSA: hda: hda_component: Initialize shared data during bind callback" has been added to the 6.9-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

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

    ALSA: hda: hda_component: Initialize shared data during bind callback

to the 6.9-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-hda_component-initialize-shared-data-during.patch
and it can be found in the queue-6.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 463c3476e925751693342b29f37df3c5b209e132
Author: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
Date:   Wed May 8 11:03:47 2024 +0100

    ALSA: hda: hda_component: Initialize shared data during bind callback
    
    [ Upstream commit ec6f32bc924d1c00cbcd5672510758f7088f2513 ]
    
    Move the initialization of the shared struct hda_component array into
    hda_component_manager_bind().
    
    The purpose of the manager bind() callback is to allow it to perform
    initialization before binding in the component drivers. This is the
    correct place to initialize the shared data.
    
    The original implementation initialized the shared data in
    hda_component_manager_init(). This is only done once during probe()
    of the manager driver. So if the component binding was unbound and
    then rebound, the shared data would not be re-initialized.
    
    Signed-off-by: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
    Fixes: fd895a74dc1d ("ALSA: hda: realtek: Move hda_component implementation to module")
    Link: https://lore.kernel.org/r/20240508100347.47283-1-rf@xxxxxxxxxxxxxxxxxxxxx
    Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/sound/pci/hda/hda_component.c b/sound/pci/hda/hda_component.c
index cd299d7d84baf..d02589014a3fa 100644
--- a/sound/pci/hda/hda_component.c
+++ b/sound/pci/hda/hda_component.c
@@ -123,6 +123,21 @@ static int hda_comp_match_dev_name(struct device *dev, void *data)
 	return !strcmp(d + n, tmp);
 }
 
+int hda_component_manager_bind(struct hda_codec *cdc,
+			       struct hda_component *comps, int count)
+{
+	int i;
+
+	/* Init shared data */
+	for (i = 0; i < count; ++i) {
+		memset(&comps[i], 0, sizeof(comps[i]));
+		comps[i].codec = cdc;
+	}
+
+	return component_bind_all(hda_codec_dev(cdc), comps);
+}
+EXPORT_SYMBOL_NS_GPL(hda_component_manager_bind, SND_HDA_SCODEC_COMPONENT);
+
 int hda_component_manager_init(struct hda_codec *cdc,
 			       struct hda_component *comps, int count,
 			       const char *bus, const char *hid,
@@ -143,7 +158,6 @@ int hda_component_manager_init(struct hda_codec *cdc,
 		sm->hid = hid;
 		sm->match_str = match_str;
 		sm->index = i;
-		comps[i].codec = cdc;
 		component_match_add(dev, &match, hda_comp_match_dev_name, sm);
 	}
 
diff --git a/sound/pci/hda/hda_component.h b/sound/pci/hda/hda_component.h
index c80a66691b5d8..c70b3de68ab20 100644
--- a/sound/pci/hda/hda_component.h
+++ b/sound/pci/hda/hda_component.h
@@ -75,11 +75,8 @@ int hda_component_manager_init(struct hda_codec *cdc,
 void hda_component_manager_free(struct hda_codec *cdc,
 				const struct component_master_ops *ops);
 
-static inline int hda_component_manager_bind(struct hda_codec *cdc,
-					     struct hda_component *comps)
-{
-	return component_bind_all(hda_codec_dev(cdc), comps);
-}
+int hda_component_manager_bind(struct hda_codec *cdc,
+			       struct hda_component *comps, int count);
 
 static inline void hda_component_manager_unbind(struct hda_codec *cdc,
 					       struct hda_component *comps)
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 3b8b4ab488a61..08598a4f1fa3f 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -6793,7 +6793,7 @@ static int comp_bind(struct device *dev)
 	struct alc_spec *spec = cdc->spec;
 	int ret;
 
-	ret = hda_component_manager_bind(cdc, spec->comps);
+	ret = hda_component_manager_bind(cdc, spec->comps, ARRAY_SIZE(spec->comps));
 	if (ret)
 		return ret;