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Diffstat (limited to 'sound/hda/hdac_device.c')
-rw-r--r--sound/hda/hdac_device.c29
1 files changed, 16 insertions, 13 deletions
diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c
index 4769f4c03e14..a265c1d68876 100644
--- a/sound/hda/hdac_device.c
+++ b/sound/hda/hdac_device.c
@@ -89,7 +89,7 @@ int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus,
fg = codec->afg ? codec->afg : codec->mfg;
- err = snd_hdac_refresh_widgets(codec, false);
+ err = snd_hdac_refresh_widgets(codec);
if (err < 0)
goto error;
@@ -394,32 +394,35 @@ static void setup_fg_nodes(struct hdac_device *codec)
/**
* snd_hdac_refresh_widgets - Reset the widget start/end nodes
* @codec: the codec object
- * @sysfs: re-initialize sysfs tree, too
*/
-int snd_hdac_refresh_widgets(struct hdac_device *codec, bool sysfs)
+int snd_hdac_refresh_widgets(struct hdac_device *codec)
{
hda_nid_t start_nid;
- int nums, err;
+ int nums, err = 0;
+ /*
+ * Serialize against multiple threads trying to update the sysfs
+ * widgets array.
+ */
+ mutex_lock(&codec->widget_lock);
nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
if (!start_nid || nums <= 0 || nums >= 0xff) {
dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
codec->afg);
- return -EINVAL;
+ err = -EINVAL;
+ goto unlock;
}
- if (sysfs) {
- mutex_lock(&codec->widget_lock);
- err = hda_widget_sysfs_reinit(codec, start_nid, nums);
- mutex_unlock(&codec->widget_lock);
- if (err < 0)
- return err;
- }
+ err = hda_widget_sysfs_reinit(codec, start_nid, nums);
+ if (err < 0)
+ goto unlock;
codec->num_nodes = nums;
codec->start_nid = start_nid;
codec->end_nid = start_nid + nums;
- return 0;
+unlock:
+ mutex_unlock(&codec->widget_lock);
+ return err;
}
EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);