Subject: ALSA: seq: Remove autoload locks in driver registration

Since we're calling request_module() asynchronously now, we can get
rid of the autoload lock in snd_seq_device_register_driver(), as well
as in the snd-seq driver registration itself.  This enables the
automatic loading of dependent sequencer modules, such as
snd-seq-virmidi from snd-emu10k1-synth.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/core/seq/seq.c b/sound/core/seq/seq.c
index bebdd2e..7e0aabb 100644 (file)
--- a/sound/core/seq/seq.c
+++ b/sound/core/seq/seq.c
@@ -86,7 +86,6 @@ static int __init alsa_seq_init(void)
 {
        int err;
 
-       snd_seq_autoload_lock();
        if ((err = client_init_data()) < 0)
                goto error;
 
@@ -112,7 +111,6 @@ static int __init alsa_seq_init(void)
 
        snd_seq_autoload_init();
  error:
-       snd_seq_autoload_unlock();
        return err;
 }
 

diff --git a/sound/core/seq/seq_device.c b/sound/core/seq/seq_device.c
index a8e2c60..0631bda 100644 (file)
--- a/sound/core/seq/seq_device.c
+++ b/sound/core/seq/seq_device.c
@@ -360,16 +360,12 @@ int snd_seq_device_register_driver(char *id, struct snd_seq_dev_ops *entry,
            entry->init_device == NULL || entry->free_device == NULL)
                return -EINVAL;
 
-       snd_seq_autoload_lock();
        ops = find_driver(id, 1);
-       if (ops == NULL) {
-               snd_seq_autoload_unlock();
+       if (ops == NULL)
                return -ENOMEM;
-       }
        if (ops->driver & DRIVER_LOADED) {
                pr_warn("ALSA: seq: driver_register: driver '%s' already exists\n", id);
                unlock_driver(ops);
-               snd_seq_autoload_unlock();
                return -EBUSY;
        }
 
@@ -386,7 +382,6 @@ int snd_seq_device_register_driver(char *id, struct snd_seq_dev_ops *entry,
        mutex_unlock(&ops->reg_mutex);
 
        unlock_driver(ops);
-       snd_seq_autoload_unlock();
 
        return 0;
 }