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[PATCH] lockdep: annotate sound/core/seq/seq_ports.c
authorIngo Molnar <mingo@elte.hu>
Mon, 3 Jul 2006 07:25:21 +0000 (00:25 -0700)
committerLinus Torvalds <torvalds@g5.osdl.org>
Mon, 3 Jul 2006 22:27:08 +0000 (15:27 -0700)
Teach special (recursive) locking code to the lock validator.  Has no effect
on non-lockdep kernels.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Jaroslav Kysela <perex@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
sound/core/seq/seq_ports.c

index d467b4f..8c64b58 100644 (file)
@@ -514,7 +514,7 @@ int snd_seq_port_connect(struct snd_seq_client *connector,
        atomic_set(&subs->ref_count, 2);
 
        down_write(&src->list_mutex);
-       down_write(&dest->list_mutex);
+       down_write_nested(&dest->list_mutex, SINGLE_DEPTH_NESTING);
 
        exclusive = info->flags & SNDRV_SEQ_PORT_SUBS_EXCLUSIVE ? 1 : 0;
        err = -EBUSY;
@@ -587,7 +587,7 @@ int snd_seq_port_disconnect(struct snd_seq_client *connector,
        unsigned long flags;
 
        down_write(&src->list_mutex);
-       down_write(&dest->list_mutex);
+       down_write_nested(&dest->list_mutex, SINGLE_DEPTH_NESTING);
 
        /* look for the connection */
        list_for_each(p, &src->list_head) {