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>

2 files changed, 0 insertions, 13 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
index afe1de998763..a454f94623d7 100644
--- a/drivers/scsi/megaraid/megaraid_sas.c
+++ b/drivers/scsi/megaraid/megaraid_sas.c
@@ -2988,17 +2988,6 @@ static int megasas_mgmt_open(struct inode *inode, struct file *filep)
 }
 
 /**
- * megasas_mgmt_release - char node "release" entry point
- */
-static int megasas_mgmt_release(struct inode *inode, struct file *filep)
-{
-        filep->private_data = NULL;
-        fasync_helper(-1, filep, 0, &megasas_async_queue);
-
-        return 0;
-}
-
-/**
  * megasas_mgmt_fasync -        Async notifier registration from applications
  *
  * This function adds the calling process to a driver global queue. When an
@@ -3345,7 +3334,6 @@ megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
 static const struct file_operations megasas_mgmt_fops = {
         .owner = THIS_MODULE,
         .open = megasas_mgmt_open,
-        .release = megasas_mgmt_release,
         .fasync = megasas_mgmt_fasync,
         .unlocked_ioctl = megasas_mgmt_ioctl,
 #ifdef CONFIG_COMPAT
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 9adf35bd8b56..5103855242ae 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -327,7 +327,6 @@ sg_release(struct inode *inode, struct file *filp)
         if ((!(sfp = (Sg_fd *) filp->private_data)) || (!(sdp = sfp->parentdp)))
                 return -ENXIO;
         SCSI_LOG_TIMEOUT(3, printk("sg_release: %s\n", sdp->disk->disk_name));
-        sg_fasync(-1, filp, 0); /* remove filp from async notification list */
         if (0 == sg_remove_sfp(sdp, sfp)) {     /* Returns 1 when sdp gone */
                 if (!sdp->detached) {
                         scsi_device_put(sdp->device);