[PATCH 1/4] ALSA: hdac: Add API for removing hdac extended device

[Vinod Koul <vinod.koul@intel.com>]

The HDAC extended device objects are created by HDAC extended bus on probe.
When controller is removed they should be removed as well, so add API
snd_hdac_ext_bus_device_remove for this

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---
 include/sound/hdaudio_ext.h  |  1 +
 sound/hda/ext/hdac_ext_bus.c | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/include/sound/hdaudio_ext.h b/include/sound/hdaudio_ext.h
index 0f89df1511dc..148267b76ab7 100644
--- a/include/sound/hdaudio_ext.h
+++ b/include/sound/hdaudio_ext.h
@@ -34,6 +34,7 @@ int snd_hdac_ext_bus_init(struct hdac_ext_bus *sbus, struct device *dev,
 void snd_hdac_ext_bus_exit(struct hdac_ext_bus *sbus);
 int snd_hdac_ext_bus_device_init(struct hdac_ext_bus *sbus, int addr);
 void snd_hdac_ext_bus_device_exit(struct hdac_device *hdev);
+void snd_hdac_ext_bus_device_remove(struct hdac_ext_bus *ebus);
 
 #define ebus_to_hbus(ebus)	(&(ebus)->bus)
 #define hbus_to_ebus(_bus) \
diff --git a/sound/hda/ext/hdac_ext_bus.c b/sound/hda/ext/hdac_ext_bus.c
index 0aa5d9eb6c3f..cf69202f7da0 100644
--- a/sound/hda/ext/hdac_ext_bus.c
+++ b/sound/hda/ext/hdac_ext_bus.c
@@ -172,3 +172,22 @@ void snd_hdac_ext_bus_device_exit(struct hdac_device *hdev)
 	kfree(hdev);
 }
 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_exit);
+
+/**
+ * snd_hdac_ext_bus_device_remove - remove HD-audio extended codec base devices
+ *
+ * @ebus: HD-audio extended bus
+ */
+void snd_hdac_ext_bus_device_remove(struct hdac_ext_bus *ebus)
+{
+	struct hdac_device *codec, *__codec;
+	/*
+	 * we need to remove all the codec devices objects created in the
+	 * snd_hdac_ext_bus_device_init
+	 */
+	list_for_each_entry_safe(codec, __codec, &ebus->bus.codec_list, list) {
+		snd_hdac_device_unregister(codec);
+		put_device(&codec->dev);
+	}
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_remove);
-- 
1.9.1