saner FASYNC handling on file close

As it is, all instances of ->release() for files that have ->fasync()
need to remember to evict file from fasync lists; forgetting that
creates a hole and we actually have a bunch that *does* forget.

So let's keep our lives simple - let __fput() check FASYNC in
file->f_flags and call ->fasync() there if it's been set.  And lose that
crap in ->release() instances - leaving it there is still valid, but we
don't have to bother anymore.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 1 deletions

diff --git a/sound/core/control.c b/sound/core/control.c
index b0bf42691047..636b3b52ef8b 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -113,7 +113,6 @@ static int snd_ctl_release(struct inode *inode, struct file *file)
         unsigned int idx;
 
         ctl = file->private_data;
-        fasync_helper(-1, file, 0, &ctl->fasync);
         file->private_data = NULL;
         card = ctl->card;
         write_lock_irqsave(&card->ctl_files_rwlock, flags);