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authorTakashi Iwai <tiwai@suse.de>2019-07-03 15:35:12 +0300
committerTakashi Iwai <tiwai@suse.de>2019-07-05 13:01:06 +0300
commit774a075ab5140bb4504e6026bf327021926c3e65 (patch)
treef1d8252e2adc8f0f6ca3bb142f5b612699f8cc7e /sound/hda
parent3450121997ce872eb7f1248417225827ea249710 (diff)
downloadlinux-774a075ab5140bb4504e6026bf327021926c3e65.tar.xz
ALSA: hda: Simplify snd_hdac_refresh_widgets()
Along with the recent fix for the races of snd_hdac_refresh_widgets() it turned out that the instantiation of widgets sysfs at snd_hdac_sysfs_reinit() could cause a race. The race itself was already covered later by extending the mutex protection range, the commit 98482377dc72 ("ALSA: hda: Fix widget_mutex incomplete protection"), but this also indicated that the call of *_reinit() is basically superfluous, as the widgets shall be created sooner or later from snd_hdac_device_register(). This patch removes the redundant call of snd_hdac_sysfs_reinit() at first. By this removal, the sysfs argument itself in snd_hdac_refresh_widgets() becomes superfluous, too, because the only case sysfs=false is always with codec->widgets=NULL. So, we drop this redundant argument as well. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/hda')
-rw-r--r--sound/hda/hdac_device.c13
-rw-r--r--sound/hda/hdac_sysfs.c2
2 files changed, 6 insertions, 9 deletions
diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c
index 11050bfd8068..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;
@@ -394,9 +394,8 @@ 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 = 0;
@@ -414,11 +413,9 @@ int snd_hdac_refresh_widgets(struct hdac_device *codec, bool sysfs)
goto unlock;
}
- if (sysfs) {
- err = hda_widget_sysfs_reinit(codec, start_nid, nums);
- if (err < 0)
- goto unlock;
- }
+ err = hda_widget_sysfs_reinit(codec, start_nid, nums);
+ if (err < 0)
+ goto unlock;
codec->num_nodes = nums;
codec->start_nid = start_nid;
diff --git a/sound/hda/hdac_sysfs.c b/sound/hda/hdac_sysfs.c
index 909d5ef1179c..e56e83325903 100644
--- a/sound/hda/hdac_sysfs.c
+++ b/sound/hda/hdac_sysfs.c
@@ -428,7 +428,7 @@ int hda_widget_sysfs_reinit(struct hdac_device *codec,
int i;
if (!codec->widgets)
- return hda_widget_sysfs_init(codec);
+ return 0;
tree = kmemdup(codec->widgets, sizeof(*tree), GFP_KERNEL);
if (!tree)