[PATCH v4 37/54] functionfs: don't bother with ffs->ref in ffs_data_{opened,closed}()

[Al Viro]

A reference is held by the superblock (it's dropped in ffs_kill_sb())
and filesystem will not get to ->kill_sb() while there are any opened
files, TYVM...

Reviewed-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Signed-off-by: Al Viro <viro at zeniv.linux.org.uk>
---
 drivers/usb/gadget/function/f_fs.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 43926aca8a40..0bcff49e1f11 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -2128,7 +2128,6 @@ static void ffs_data_get(struct ffs_data *ffs)
 
 static void ffs_data_opened(struct ffs_data *ffs)
 {
-	refcount_inc(&ffs->ref);
 	if (atomic_add_return(1, &ffs->opened) == 1 &&
 			ffs->state == FFS_DEACTIVATED) {
 		ffs->state = FFS_CLOSING;
@@ -2153,11 +2152,11 @@ static void ffs_data_put(struct ffs_data *ffs)
 
 static void ffs_data_closed(struct ffs_data *ffs)
 {
-	struct ffs_epfile *epfiles;
-	unsigned long flags;
-
 	if (atomic_dec_and_test(&ffs->opened)) {
 		if (ffs->no_disconnect) {
+			struct ffs_epfile *epfiles;
+			unsigned long flags;
+
 			ffs->state = FFS_DEACTIVATED;
 			spin_lock_irqsave(&ffs->eps_lock, flags);
 			epfiles = ffs->epfiles;
@@ -2176,7 +2175,6 @@ static void ffs_data_closed(struct ffs_data *ffs)
 			ffs_data_reset(ffs);
 		}
 	}
-	ffs_data_put(ffs);
 }
 
 static struct ffs_data *ffs_data_new(const char *dev_name)
-- 
2.47.3