Commit 54841a06 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: seq: Use atomic ops for autoload refcount 



... just to robustify for races.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent bfe01a5b

sound/core/seq/seq_device.c

+4 −4
Original line number Diff line number Diff line
@@ -127,15 +127,15 @@ static void snd_seq_device_info(struct snd_info_entry *entry, 


#ifdef CONFIG_MODULES

/* avoid auto-loading during module_init() */

static int snd_seq_in_init;

static atomic_t snd_seq_in_init = ATOMIC_INIT(0);

void snd_seq_autoload_lock(void)

{

	snd_seq_in_init++;

	atomic_inc(&snd_seq_in_init);

}



void snd_seq_autoload_unlock(void)

{

	snd_seq_in_init--;

	atomic_dec(&snd_seq_in_init);

}

#endif
@@ -147,7 +147,7 @@ void snd_seq_device_load_drivers(void) 
	/* Calling request_module during module_init()

	 * may cause blocking.

	 */

	if (snd_seq_in_init)

	if (atomic_read(&snd_seq_in_init))

		return;



	mutex_lock(&ops_mutex);